A fair comparison puts like with like. Before you set one firm’s ratios against another’s, check the type of business, the size, the period and the definitions. Then say what the ratios show and what they cannot show.
This lesson builds on interpreting a profitability change and belongs to ratios and interpretation.
What makes a comparison fair?
Ask five questions in this order:
- Same kind of business? A hardware shop and a café have very different cost structures.
- Similar size? A large firm may buy in bulk and pay less per item.
- Same period? A year ending in a festive month may include unusual sales.
- Same policies? Different depreciation methods change profit without changing cash.
- Same definitions? Both firms’ ratios must use identical formulas.
If the answer to any question is no, you can still compare. You simply state the difference and soften the conclusion.
Worked example
Bengkel Cahaya sells hardware. Kafe Rimba is a café. Both are fictional, and both had a profit margin of 10% last year.
| Bengkel Cahaya (RM) | Kafe Rimba (RM) | |
|---|---|---|
| Revenue | 200,000 | 120,000 |
| Gross profit | 50,000 | 78,000 |
| Expenses | 30,000 | 66,000 |
| Profit for the year | 20,000 | 12,000 |
Check: 50,000 − 30,000 = 20,000 and 78,000 − 66,000 = 12,000.
Step 1, calculate the ratios. Gross margin: Bengkel Cahaya 50,000 ÷ 200,000 = 25%; Kafe Rimba 78,000 ÷ 120,000 = 65%. Profit margin: 20,000 ÷ 200,000 = 10%; 12,000 ÷ 120,000 = 10%. Expenses as % of revenue: 30,000 ÷ 200,000 = 15%; 66,000 ÷ 120,000 = 55%.
Step 2, describe the pattern. The profit margins are equal, but the paths differ. The café keeps a much higher share of each sale after food costs, yet spends a far higher share on running costs.
Step 3, add context. A café sells prepared food and drink, so a high gross margin is normal, and its wages and rent take a bigger share. A hardware shop sells goods bought and resold, so a lower gross margin is normal.
Step 4, conclude carefully. Neither firm can be called better on these ratios alone. To go further, you would need the trend over several years, the owner’s capital, and the cash position.
The mistake to watch for
Mistaken answer: “Kafe Rimba has a gross margin of 65% against 25%, so Kafe Rimba is more profitable.”
The student looked at one ratio and ignored that the profit margins are both 10%.
The correction is to compare at more than one level of the income statement and to compare the type of business. A high gross margin may be eaten up by expenses.
Check yourself
1. Shop A has a gross margin of 30% and a profit margin of 8%. Shop B has a gross margin of 22% and a profit margin of 9%. Both sell clothes in the same town. What can you say?
Show answer
Shop B keeps 9 sen of profit from each RM1 of sales against 8 sen for Shop A, even though its gross margin is lower. That suggests lower expenses at Shop B. You would still check size, year end and any one-off items before judging.
2. List three pieces of context you would check before comparing two firms.
Show answer
Any three of: type of business, size, year end, depreciation or inventory policy, how each is financed, whether ratio formulas match, and whether there were one-off events.
3. Firm X earned RM8,000 profit on revenue of RM80,000. Firm Y earned RM40,000 on RM800,000. Compare them.
Show answer
Firm X: 8,000 ÷ 80,000 = 10%. Firm Y: 40,000 ÷ 800,000 = 5%. Firm X has the higher margin, but Firm Y earns far more in amount. Size and business type matter before concluding anything.
Where this leads next
The final lesson is explaining a ratio’s limitation. Use the double-entry and ledger trainer to rebuild statements, then test yourself with the ratios practice set. The percentage-base explorer helps with the arithmetic.
A teacher in online one-to-one Accounting tuition can read your comparison answers and show where context was missing.