estimate:\n$\frac{5}{8}-\frac{4}{7}=$\na 0\nb 1\nc $\frac{9}{15}$\nd $\frac{20}{56}$

Explanation:

Step1: Approximate the fractions

$\frac{5}{8}\approx\frac{1}{2}$ (since $5$ is close to half of $8$), $\frac{4}{7}\approx\frac{1}{2}$ (since $4$ is close to half of $7$).

Step2: Subtract the approximated fractions

$\frac{1}{2}-\frac{1}{2}=0$

Answer:

A. 0