15/50 as a Decimal 0.3 15/50 = 0.3 = 30% Copy 15/50 = 0.3 = 30%. Simplified: 3/10. Formula Used15 ÷ 50 = 0.3 Frequently Asked Questions What is 15/50 as a decimal?0.3.What is 15/50 as a percentage?30%.