To find out what number 90 is a percentage of to equal 45, we can set up a simple equation. Let’s denote the unknown number as x. We know that 90% of x equals 45. In mathematical terms, this is expressed as:
0.90 * x = 45
Next, to solve for x, we divide both sides of the equation by 0.90:
x = 45 / 0.90
When you perform the division, you get:
x = 50
This means that 90% of 50 equals 45. Therefore, the number you are looking for is 50.