30/64 as a Decimal 0.46875 30/64 = 0.46875 = 46.875% Copy 30/64 = 0.46875 = 46.875%. Simplified: 15/32. Formula Used30 ÷ 64 = 0.46875 Frequently Asked Questions What is 30/64 as a decimal?0.46875.What is 30/64 as a percentage?46.875%.