58/64 as a Decimal 0.90625 58/64 = 0.90625 = 90.625% Copy 58/64 = 0.90625 = 90.625%. Simplified: 29/32. Formula Used58 ÷ 64 = 0.90625 Frequently Asked Questions What is 58/64 as a decimal?0.90625.What is 58/64 as a percentage?90.625%.