4/64 as a Decimal 0.0625 4/64 = 0.0625 = 6.25% Copy 4/64 = 0.0625 = 6.25%. Simplified: 1/16. Formula Used4 ÷ 64 = 0.0625 Frequently Asked Questions What is 4/64 as a decimal?0.0625.What is 4/64 as a percentage?6.25%.