\({8 \over 5a}+{2 \over 5a}={10 \over 5a}={2 \over a}\)

\({7 \over a}+{9 \over 5a}={35 \over 5a}+{9 \over 5a}={44 \over 5a}\)

\({8 \over 4x}-{2 \over 9y}={72y \over 36xy}-{8x \over 36xy}={72y-8x \over 36xy}={18y-2x \over 9xy}\)

\(8+{5 \over 9p}={8 \over 1}+{5 \over 9p}={72p \over 9p}+{5 \over 9p}={72p+5 \over 9p}\)

\({2x \over y}+{4 \over 9y}={18x \over 9y}+{4 \over 9y}={18x+4 \over 9y}\)

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

\({a \over 9a}={1 \over 9}\)

\({20x \over -45x}=-\frac{4}{9}\)

\({24p \over -3p}=-8\)

\({8ab \over 28ac}={2b \over 7c}\)

\({15b \over 25ab}={3 \over 5a}\)

\({-21xyz \over -3yz}=7x\)

\({7xy \over y}+{5xz \over z}=7x+5x=12x\)