12/100 as a Decimal 0.12 12/100 = 0.12 = 12% Copy 12/100 = 0.12 = 12%. Simplified: 3/25. Formula Used12 ÷ 100 = 0.12 Frequently Asked Questions What is 12/100 as a decimal?0.12.What is 12/100 as a percentage?12%.