College Math Placement Practice Test

If 4/5 is subtracted by 1/5, what is the result?

1. A. 3/5

2. B. 1

3. C. 4

4. D. 1/5

The correct answer is: A. 3/5

To find the result of subtracting \( \frac{1}{5} \) from \( \frac{4}{5} \), you begin by aligning the fractions: \[ \frac{4}{5} - \frac{1}{5} \] Since both fractions have the same denominator (5), you can directly subtract the numerators while keeping the denominator the same. This gives you: \[ \frac{4 - 1}{5} = \frac{3}{5} \] Thus, the result of subtracting \( \frac{1}{5} \) from \( \frac{4}{5} \) is \( \frac{3}{5} \). This outcome makes sense because you're essentially removing a smaller fraction (\( \frac{1}{5} \)) from a larger fraction (\( \frac{4}{5} \)). It's also noteworthy that the other choices do not reflect the correct subtraction. For instance, 1 would be incorrect as it would indicate that you have a whole instead of a fraction, and 4 and \( \frac{1}{5} \) do not correctly capture the subtraction that occurred. Thus, the correct answer is indeed \( \frac