What is 20% of 25? 5 20% of 25 Copy 20% of 25 = 5. Formula UsedResult = (20 ÷ 100) × 25 = 5 Frequently Asked Questions What is 20% of 25?5. (20 ÷ 100) × 25 = 5.How to calculate 20%?Multiply by 0.2 (or multiply by 20 then divide by 100).