Answer
$\frac{-4}{105}$ or $-\frac{4}{105}$
Work Step by Step
Step 1: $\frac{8}{15}-\frac{4}{7}$
Step 2: $\frac{8\times7}{15\times7}-\frac{4\times15}{7\times15}$
Step 3: $\frac{56}{105}-\frac{60}{105}$
Step 4: $\frac{56-60}{105}$
Step 5: $\frac{-4}{105}$ or $-\frac{4}{105}$