3/64 as a Decimal 0.046875 3/64 = 0.046875 = 4.6875% Copy 3/64 = 0.046875 = 4.6875%. Formula Used3 ÷ 64 = 0.046875 Frequently Asked Questions What is 3/64 as a decimal?0.046875.What is 3/64 as a percentage?4.6875%.