If 35% of a number is 21 and 55% of the same number is 33, find 90% of that number.

Answer 1

Let the number be x.

Given that 35% of the number is 21:
0.35x = 21
x = 21 / 0.35
x = 60

Given that 55% of the number is 33:
0.55x = 33
x = 33 / 0.55
x = 60

Therefore, 90% of the number is:
0.90 * 60 = 54

So, 90% of that number is 54.