An infinite number of ways. 99+9/9 (99+9/9)*9/9 (99+9/9)*99/99 (99+9/9)*999/999 (99+9/9)*9/9*9/9 etc
99 ÷ 9 = 11
11 times 9=99.
99
99 of them with a remainder of 9
The answer is 6.99574217 × 1013
9
Eleven (11)
There are infinitely many solutions to 11x - 99 = 11(x - 9)
9 - 9 + 9 / 9 + 99 = 100solution:9 - 9 = 00 + 9 = 99 / 9 = 11 + 99 = 100A more simple approach might be 99-(-99/99) which simplifies to 99+1=100.
99 plus (99/99) = 100
The LCM of 9 and 99 is 99.