Three calculators in one: percentage of a number, what percent one number is of another, and percentage change. Results update as you type.
X × Y ÷ 100X ÷ Y × 100(new − old) ÷ |old| × 100Multiply the number by the percentage and divide by 100. For example, 18% of 2,500 = 2,500 × 18 ÷ 100 = 450.
Divide the part by the total and multiply by 100. For example, 450 out of 600 = 450 ÷ 600 × 100 = 75%. This is how exam marks percentages are calculated.
Subtract the old value from the new value, divide by the old value and multiply by 100. For example, a salary going from ₹40,000 to ₹46,000 is a (46,000 − 40,000) ÷ 40,000 × 100 = 15% increase.
No. 100 → 110 (up 10%) → 99 (down 10% of 110). Percentage changes are relative to the value at the time, so they do not cancel out.