65/100 as a Decimal 0.65 65/100 = 0.65 = 65% Copy 65/100 = 0.65 = 65%. Simplified: 13/20. Formula Used65 ÷ 100 = 0.65 Frequently Asked Questions What is 65/100 as a decimal?0.65.What is 65/100 as a percentage?65%.