\({4 \over 8p}-{6 \over 8p}=-{2 \over 8p}=-{1 \over 4p}\)

\({6 \over a}-{5 \over 8a}={48 \over 8a}-{5 \over 8a}={43 \over 8a}\)

\({5 \over 7x}+{2 \over 3y}={15y \over 21xy}+{14x \over 21xy}={15y+14x \over 21xy}\)

\(7-{8 \over 9x}={7 \over 1}-{8 \over 9x}={63x \over 9x}-{8 \over 9x}={63x-8 \over 9x}\)

\({4a \over b}-{6 \over 8b}={32a \over 8b}-{6 \over 8b}={32a-6 \over 8b}={16a-3 \over 4b}\)

\({5p \over p}={5 \over 1}=5\)

\({a \over 5a}={1 \over 5}\)

\({-6x \over -14x}=\frac{3}{7}\)

\({15a \over 3a}=5\)

\({-15xy \over 35xz}=-{3y \over 7z}\)

\({-20y \over -32xy}={5 \over 8x}\)

\({-21abc \over 3bc}=-7a\)

\({5pq \over q}-{4pr \over r}=5p-4p=p\)