1/9 as a Decimal 0.11111111 1/9 = 0.11111111 = 11.111111% Copy 1/9 = 0.11111111 = 11.111111%. Formula Used1 ÷ 9 = 0.11111111 Frequently Asked Questions What is 1/9 as a decimal?0.11111111.What is 1/9 as a percentage?11.111111%.