8/9 as a Decimal 0.88888889 8/9 = 0.88888889 = 88.888889% Copy 8/9 = 0.88888889 = 88.888889%. Formula Used8 ÷ 9 = 0.88888889 Frequently Asked Questions What is 8/9 as a decimal?0.88888889.What is 8/9 as a percentage?88.888889%.