How do I calculate a percentage of an amount?

To calculate a percentage of a amount, just convert the percentage to a decimal by dividing by 100 and multiply it by the amount.

Steps:

1. Convert the percentage to a decimal: Divide by 100 or move the decimal point two places left.

• Example:     20% → 0.20;     7.5% → 0.075.

2. Multiply by the amount:

Example: What is 25% of 80?

• Convert 25%:   25 ÷ 100 = 0.25
• Calculate:   0.25 × 80 = 20
  Answer: 20

Key Notes:

• Works for any amount (numbers, quantities, values).
• Handles percentages >100% (e.g., 150% of 50 = 75) or decimals (e.g., 8.5% of 200 = 17).

Formula Reference:

Or you can use our Percentage Calculator to get the result directly.