16/20 as a Decimal 0.8 16/20 = 0.8 = 80% Copy 16/20 = 0.8 = 80%. Simplified: 4/5. Formula Used16 ÷ 20 = 0.8 Frequently Asked Questions What is 16/20 as a decimal?0.8.What is 16/20 as a percentage?80%.