56/64 as a Decimal 0.875 56/64 = 0.875 = 87.5% Copy 56/64 = 0.875 = 87.5%. Simplified: 7/8. Formula Used56 ÷ 64 = 0.875 Frequently Asked Questions What is 56/64 as a decimal?0.875.What is 56/64 as a percentage?87.5%.