What is 1% of 20? 0.2 1% of 20 Copy 1% of 20 = 0.2. Formula UsedResult = (1 ÷ 100) × 20 = 0.2 Frequently Asked Questions What is 1% of 20?0.2. (1 ÷ 100) × 20 = 0.2.How to calculate 1%?Multiply by 0.01 (or multiply by 1 then divide by 100).