What is 5% of 20? 1 5% of 20 Copy 5% of 20 = 1. Formula UsedResult = (5 ÷ 100) × 20 = 1 Frequently Asked Questions What is 5% of 20?1. (5 ÷ 100) × 20 = 1.How to calculate 5%?Multiply by 0.05 (or multiply by 5 then divide by 100).