5/100 as a Decimal 0.05 5/100 = 0.05 = 5% Copy 5/100 = 0.05 = 5%. Simplified: 1/20. Formula Used5 ÷ 100 = 0.05 Frequently Asked Questions What is 5/100 as a decimal?0.05.What is 5/100 as a percentage?5%.