8/64 as a Decimal 0.125 8/64 = 0.125 = 12.5% Copy 8/64 = 0.125 = 12.5%. Simplified: 1/8. Formula Used8 ÷ 64 = 0.125 Frequently Asked Questions What is 8/64 as a decimal?0.125.What is 8/64 as a percentage?12.5%.