Let's face it, business involves numbers and calculations. Major corporations and companies use quantitative studies in various stages of their day-to-day operations to ensure they're bringing home the bacon. This use of quantitative data is crucial for CEOs and investors to conceptualize a project, profit margins, sales data, marketing conversion rates, and profits per sale.
Like how peanut butter and jam make for a great sandwich, one must have good mathematical skills and quantitative data to make decisions that result in profits, with the least amount of risk. Some of the types of mathematical data involve percentages, averages, statistical data, and median outcomes. These data can, and have been, used in day-to-day business operations. Take 'average per receipt' for example. This data informs the company how much an average shopper would potentially spend in a single receipt.
Basic Percentage Calculation in Business
The Longman Dictionary of Contemporary English defines percentage as 'an amount expressed as if it is part of a total, which is 100'. Percentage basically means 'out of 100'. To calculate the percentage of a quantity, divide the amount by the total number, then multiply by 100.
Example 1: If 100 out of 250 items are defective, what percentage is defective?
Percentage = (100 ÷ 250) × 100 = 40%
Example 2: If an item was sold for $74.50, and $25 out of that is profit, what is the profit percentage?
Percentage = (25 ÷ 74.50) × 100 = 33.55% profit
If a business must charge a 10% service charge on a meal of $125, here's how to calculate the total bill:
Step 1: 10 ÷ 100 = 0.1
Step 2: 0.1 × $125 = $12.50 (Service charge amount)
Step 3: $12.50 + $125 = $137.50 (Total bill)
Following the calculation shown above, the total bill amount that would be charged to the customer is $137.50.
Calculating Percentage Changes
Percentage changes are used for the depreciation or appreciation in the value of an asset. You usually hear people complaining about how their property bought from 2000 has dropped in value, due to the economy. You can calculate that drop in percentage to understand the financial impact.
Asset Depreciation
Each cycle's depreciation quantity is calculated using this formula:
Problem: In a 15-cycle year, if the asset's expected life is 80 months, what is the depreciation rate per cycle?
Annual depreciation rate = 15 ÷ 80 = 18.75%
Depreciation rate per cycle = 18.75% ÷ 12 = 1.5625%
Stock Price Changes
Another type of percentage change is in stock trading. This uses basic mathematics to find the percentage change in a stock price over a set period of time. The percentage change can start from the year-to-date, from whence the trader started trading, or quick changes in day-to-day trading.
Problem: MediaCorp closed at $575.25, and by 3pm the next trading day, was up at $636.47. What is the percentage increase?
Price increase = $636.47 - $575.25 = $61.22
Percentage change = ($61.22 ÷ $575.25) × 100 = 10.64%
✅ Result: MediaCorp shares increased by 10.64%. A positive percentage indicates an increase in stock value, whilst stocks dropping in value is denoted by a negative percentage.
Sales Percentages and Profit Margins
Sales percentages are essential data for making important financial decisions by the company. A lot of this data is used to track and reflect the company's financial records, and knowing how to utilise sales percentages is important to run a business successfully.
Calculating Profit Margin Percentage
Profit margin is one of the most important metrics in business. It shows how much of each dollar earned is actually profit after accounting for the cost of goods sold.
Where: Gross Profit = Total Sales – Cost of Goods Sold
Problem: A company has total sales of $450,000 and the cost of goods sold is $87,000. What is the gross profit margin?
Step 1: Calculate gross profit
Gross Profit = $450,000 – $87,000 = $363,000
Step 2: Divide gross profit by sales revenue
$363,000 ÷ $450,000 = 0.806
Step 3: Multiply by 100 to obtain the percentage
0.806 × 100 = 80.6%
✅ Result: The gross profit margin is 80.6%. This refers to the profit obtained by the company after selling their goods. With this, you can now track how much profit your company makes, as well as set target profit goals for the future years.
Understanding Interest Calculations
When you take a loan from the bank or a licensed moneylender, you have to pay the cost of obtaining the loan: Interest! Knowing how much interest is being charged on loans, fixed deposits, and investments allows you to make better financial decisions and avoid any debt trap.
Simple Interest
Simple interest is calculated by taking the interest rate and multiplying it by the principal sum, then by the number of years. This is straightforward and commonly used for short-term loans and fixed deposits.
Problem: If you invested $15,000 in a fixed deposit that accrues 3% per year, how much interest would you accumulate after 15 years?
Simple Interest = $15,000 × 0.03 × 15 = $6,750
✅ Result: You make $6,750 in interest for the 15 years you have kept your money in a fixed deposit scheme.
Simple vs. Compound Interest
While simple interest is straightforward, most financial products use compound interest, which can significantly increase your returns—or your debt obligations.
Compound interest is the interest you earn on interest. The principal sum changes each year due to the accrual, which means your interest grows exponentially over time.
Scenario: Compare $10,000 invested at 5% interest per annum for 2 years
Year 1: $10,000 × 1.05 = $10,500
Year 2: $10,500 × 1.05 = $11,025
✅ Result: With compound interest, you earn $1,025 in interest, compared to $1,000 with simple interest. The difference may seem small, but over longer periods and higher rates, compound interest can be substantial.
⚠️ Important: Credit Card Debt
Mortgages and credit cards usually run on the compound interest system. It's a bit 'confusing', as the principal sum changes each year due to the accrual. Most corporations hire or use software to perform these complex calculations. For example, be sure to pay your credit card debt on time, otherwise your interest is going to snowball!
Using Excel for Business Calculations
We get that all these numbers and formulas are making you see question marks. Fret not, Excel makes calculating the data you need impressively easy!
Firstly, open up Excel and type (=) in a cell. This is the way you initiate Excel to do a calculation for you. Key in the equation you want to calculate. For example, type =75 * 100 / 25 and press 'Enter'. Excel will automatically calculate and display the answer in the cell. Easy!
Making use of Excel for your business administration needs is a great hack to avoid paying an accountant, or buying premium business software. However, know that most businesses require payroll accounts, billing, database and much more. So, it would help to use a combination of Excel and a few other software to make your business run as smooth as butter!
Conclusion
Understanding how to calculate and apply percentages in business is a critical skill for financial success. Whether you're analyzing profit margins, evaluating investment returns, or making pricing decisions, the ability to work with percentages accurately and efficiently will serve you well in your professional career.
The key to mastering business percentages is practice and understanding the underlying principles. Start with the basic formula, work through real-world examples, and gradually tackle more complex scenarios. As you become more comfortable with these calculations, you'll find yourself making better financial decisions with greater confidence.
Remember to always verify your calculations, use tools like Excel to reduce errors, and when in doubt, consult with financial professionals. The time you invest in understanding these concepts now will pay dividends throughout your business career.
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