42/50 as a Decimal 0.84 42/50 = 0.84 = 84% Copy 42/50 = 0.84 = 84%. Simplified: 21/25. Formula Used42 ÷ 50 = 0.84 Frequently Asked Questions What is 42/50 as a decimal?0.84.What is 42/50 as a percentage?84%.