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

Explanation:

Step1: Find a common denominator

The common - denominator of 8 and 7 is (8\times7 = 56).

Step2: Rewrite the fractions

(\frac{5}{8}=\frac{5\times7}{8\times7}=\frac{35}{56}), (\frac{4}{7}=\frac{4\times8}{7\times8}=\frac{32}{56}).

Step3: Subtract the fractions

(\frac{5}{8}-\frac{4}{7}=\frac{35}{56}-\frac{32}{56}=\frac{35 - 32}{56}=\frac{3}{56}\approx0) (since (\frac{3}{56}) is a very small positive number).

Answer:

A. 0