10 percent of 99 can be written as 20 percent * 99 =
Use the percentage formulae (P% × Y = X) to find out 10% of 99
P is 10, Y is 99, so the equation will be 10% × 99 = X
Percentage calculation with steps:
X = ( 10 * 99 ) / 100
X = 990 / 100
X = 9.9