Step-by-Step Calculation
Formula: 5% of 400 = (5 ÷ 100) × 400
Step 1: Convert the percentage to a decimal: 5 ÷ 100 = 0.0500
Step 2: Multiply: 0.0500 × 400 = 20
Related Percentages of 400
5% of Other Numbers
How to Calculate Percentages
To find X% of Y, multiply Y by X/100. For example, 5% of 400 means "5 hundredths of 400" — or 0.0500 × 400 = 20. This works for any percentage and any number. Percentages are used for discounts (25% off), tips (20% of the bill), taxes (8.5% sales tax), and statistics (55% approval rating).
Reverse calculation: 20 is what percent of 400? Answer: 5%. Formula: (20 ÷ 400) × 100 = 5%.
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