College Math Placement Practice Test

If you subtract 1/5 from 4/5, what numerator remains?

1. A. 2

2. B. 3

3. C. 1

4. D. 0

The correct answer is: B. 3

To find the numerator that remains after subtracting \( \frac{1}{5} \) from \( \frac{4}{5} \), you start by performing the subtraction: \[ \frac{4}{5} - \frac{1}{5} = \frac{4 - 1}{5} = \frac{3}{5} \] After the subtraction, the result is \( \frac{3}{5} \). The numerator of this fraction, which is what the question asks for, is 3. This means that when you calculate the difference, the correct numerator that remains after subtracting \( \frac{1}{5} \) from \( \frac{4}{5} \) is indeed 3.