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Calculate percentages with 4 modes: find X% of Y, what percent is X of Y, increase/decrease by %, and find the original value after a percentage change.
A percentage is a number expressed as a fraction of 100. Percentage calculations include finding X% of a number, determining what percent one number is of another, and applying percentage increases or decreases.
Calculate what a percentage of a number is.
Formula
Result = (% ÷ 100) × Value% = the percentage to apply (e.g., 15)
Value = the base number you are working with
Result = the calculated portion of the value
Worked Example
Find 15% of 200 (e.g., a 15% restaurant tip)
Did you know? 'Percent' comes from the Latin 'per centum' meaning 'by the hundred.' The % symbol first appeared in a 1425 Italian manuscript as a shorthand for 'p100' and evolved over centuries into the modern form.
Sources
Multiply the value by the percentage divided by 100.
Divide the part by the whole, multiply by 100.
Apply a multiplier based on the percentage.
Reverse the calculation by dividing.
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