20/100 as a Decimal 0.2 20/100 = 0.2 = 20% Copy 20/100 = 0.2 = 20%. Simplified: 1/5. Formula Used20 ÷ 100 = 0.2 Frequently Asked Questions What is 20/100 as a decimal?0.2.What is 20/100 as a percentage?20%.