To find the number of which 63 is 90 percent, we can set up the equation:
63 = 90% × X
First, convert the percentage to a decimal by dividing by 100:
90% = 0.90
Now, the equation becomes:
63 = 0.90 × X
To solve for X, divide both sides of the equation by 0.90:
X = 63 ÷ 0.90
X = 70
Therefore, 63 is 90 percent of 70.