50/100 as a Decimal 0.5 50/100 = 0.5 = 50% Copy 50/100 = 0.5 = 50%. Simplified: 1/2. Formula Used50 ÷ 100 = 0.5 Frequently Asked Questions What is 50/100 as a decimal?0.5.What is 50/100 as a percentage?50%.