How this calculation works
Divide the part by the whole, then express the resulting fraction as a percentage. The whole must be nonzero.
Percentage = part ÷ whole × 100A worked example
30 is 15% of 200.
Good to know
Uses the stated formula and assumptions. Displayed decimal values are rounded; use consistent units for all inputs.
A fraction and a percentage tell the same story
If 30 of 200 seats are occupied, the fraction is 30/200 = 0.15. Multiplying by 100 expresses that same share as 15%. Nothing about the underlying count changes; only the way the proportion is written changes.
A result above 100% is possible. Spending ₹120 against a ₹100 budget uses 120% of the budget. That does not mean the calculation failed; it means the chosen part exceeds the chosen reference whole.
Name the whole before entering numbers
“What percent of sales is profit?” and “what percent of cost is profit?” use different denominators. The resulting margin and markup can both be correct while giving different answers. A clear label for the whole prevents a misleading comparison.
The whole must not be zero. If you are comparing a change from one period to another, use the original period as the reference and state that convention rather than leaving the denominator ambiguous.
A few questions, answered
Can the part be larger than the whole?
Yes. The result then exceeds 100%.
Do I enter 15% as 15 or 0.15 here?
Enter the actual part and whole, not a percentage. The result is converted to percent for you.