\({8 \over 9 x} - {2 \over 9 x} = {6 \over 9 x} = {2 \over 3 x}\)

\({3 \over p} + {2 \over 6 p} = {18 \over 6 p} + {2 \over 6 p} = {20 \over 6 p} = {10 \over 3 p}\)

\({6 \over 3 x} + {2 \over 4 y} = {24 y \over 12 x y} + {6 x \over 12 x y} = {24 y + 6 x \over 12 x y} = {4 y + x \over 2 x y}\)

\(9 + {3 \over 4 a} = {9 \over 1} + {3 \over 4 a} = {36 a \over 4 a} + {3 \over 4 a} = {36 a + 3 \over 4 a}\)

\({7 a \over b} + {9 \over 8 b} = {56 a \over 8 b} + {9 \over 8 b} = {56 a + 9 \over 8 b}\)

\({3 x \over x} = {3 \over 1} = 3\)

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

\({-32 a \over -36 a} = \frac{8}{9}\)

\({-28 p \over 4 p} = -7\)

\({-15 a b \over 18 a c} = -{5 b \over 6 c}\)

\({4 y \over 14 x y} = {2 \over 7 x}\)

\({4 a b c \over -2 b c} = -2 a\)

\({5 p q \over q} + {2 p r \over r} = 5 p + 2 p = 7 p\)

\(4 a - {7 \over 6 a} = {4 a \over 1} ⋅ {6 a \over 6 a} - {7 \over 6 a} = {24 a^{2} \over 6 a} - {7 \over 6 a} = {24 a^{2} - 7 \over 6 a}\)

\({7 b \over 3 a} - {4 a \over 2 b} = {14 b^{2} \over 6 a b} - {12 a^{2} \over 6 a b} = {-12 a^{2} + 14 b^{2} \over 6 a b} = {-6 a^{2} + 7 b^{2} \over 3 a b}\)

\({8 \over x} ⋅ {7 \over y} = {56 \over x y}\)

\({x \over 3} ⋅ -{5 \over y} = -{5 x \over 3 y}\)

\(-{7 \over 4} ⋅ p = -{7 p \over 4}\)

\({7 b \over a} ⋅ {a - 2 \over 9} = {7 b (a - 2) \over 9 a} = {7 a b - 14 b \over 9 a}\)

\({3 \over x} : {9 \over y} = {3 \over x} ⋅ {y \over 9} = {3 y \over 9 x} = {y \over 3 x}\)

\(-{5 \over 6} : p = -{5 \over 6} : {p \over 1} = -{5 \over 6} ⋅ {1 \over p} = -{5 \over 6 p}\)

\({8 \over 5} : {x - 4 y \over y} = {8 \over 5} ⋅ {y \over x - 4 y} = {8 y \over 5 (x - 4 y)} = {8 y \over 5 x - 20 y}\)

\({a \over 8} + {a - 6 \over 9} = {9 a \over 72} + {8 (a - 6) \over 72} = {9 a + 8 (a - 6) \over 72} = {17 a - 48 \over 72}\)

\({-9 p - 3 \over -7 p - 1} - 4 = {-9 p - 3 \over -7 p - 1} + {-4 (-7 p - 1) \over -7 p - 1} = {-9 p - 3 - 4 (-7 p - 1) \over -7 p - 1} = {-9 p - 3 + 28 p + 4 \over -7 p - 1} = {19 p + 1 \over -7 p - 1}\)