Percentage Calculator
Calculate percentages in 4 modes: percent of, what percent, percent change, and increase/decrease.
How to Calculate Percentages
A percentage (%) represents a fraction of 100.
Mode 1 — X% of Y: Y × X ÷ 100
Example: 15% of 50,000 = 50,000 × 15 ÷ 100 = 7,500
Mode 2 — X is what % of Y: X ÷ Y × 100
Example: 30 is what % of 200? = 30 ÷ 200 × 100 = 15%
Mode 3 — Percent Change: (Y - X) ÷ X × 100
Example: 100 to 120 = (120 - 100) ÷ 100 × 100 = +20%
Mode 4 — Increase/Decrease: X × (1 ± Y÷100)
Example: $50,000 after 10% discount = 50,000 × 0.9 = 45,000
Mode 1 — X% of Y: Y × X ÷ 100
Example: 15% of 50,000 = 50,000 × 15 ÷ 100 = 7,500
Mode 2 — X is what % of Y: X ÷ Y × 100
Example: 30 is what % of 200? = 30 ÷ 200 × 100 = 15%
Mode 3 — Percent Change: (Y - X) ÷ X × 100
Example: 100 to 120 = (120 - 100) ÷ 100 × 100 = +20%
Mode 4 — Increase/Decrease: X × (1 ± Y÷100)
Example: $50,000 after 10% discount = 50,000 × 0.9 = 45,000