5/20 as a Decimal 0.25 5/20 = 0.25 = 25% Copy 5/20 = 0.25 = 25%. Simplified: 1/4. Formula Used5 ÷ 20 = 0.25 Frequently Asked Questions What is 5/20 as a decimal?0.25.What is 5/20 as a percentage?25%.