6/20 as a Decimal 0.3 6/20 = 0.3 = 30% Copy 6/20 = 0.3 = 30%. Simplified: 3/10. Formula Used6 ÷ 20 = 0.3 Frequently Asked Questions What is 6/20 as a decimal?0.3.What is 6/20 as a percentage?30%.