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Percentages

Convert between %, decimals and fractions. Compute percent of a number, percent change, discounts and sales tax — the math behind every receipt.

70% remaining0%price × (1 − 0.30)100%
Discount: 100% → 70%

Worked Example

18% tip on $54

Given: Bill = $54

  1. 1

    Convert to decimal

    18% = 0.18

Worked Example

Percent change 80 → 96

Given: Old = 80, new = 96

  1. 1

    Difference

    96 − 80 = 16

Timed Game · 6 problems
02:00

Answer 6 problems in 2 min. Timer auto-stops.