What is 20% of 80? 16 20% of 80 Copy 20% of 80 = 16. Formula UsedResult = (20 ÷ 100) × 80 = 16 Frequently Asked Questions What is 20% of 80?16. (20 ÷ 100) × 80 = 16.How to calculate 20%?Multiply by 0.2 (or multiply by 20 then divide by 100).