Answer:
70.
Step-by-step explanation:
Let x be the required number.
We are asked to find the number whose 90% equals to 63.
We can represent our given information in an equation as:
\(\frac{90}{100}\cdot x=63\)
Now, we need to solve for x.
\(0.90x=63\)
\(\frac{0.90x}{0.90}=\frac{63}{0.90}\)
\(x=70\)
Therefore, 90% of 70 is 63.
