To find the percentage of $100,000 that equals $90,000, you can use the formula:
\[ \text{Percentage} = \left(\frac{\text{Part}}{\text{Whole}}\right) \times 100 \]
In this case, the part is $90,000 and the whole is $100,000:
\[ \text{Percentage} = \left(\frac{90,000}{100,000}\right) \times 100 \]
Now, calculate it:
\[ \frac{90,000}{100,000} = 0.9 \]
Then multiply by 100:
\[ 0.9 \times 100 = 90 \]
So, \(90%\) of $100,000 equals $90,000.
The answer is 90.