Пошаговое объяснение:

1/2 и 1/3 => (1*3)/(2*3) и (1*2)/(3*2) => 3/6 и 2/6

1/2 и 5/6 => (1*3)/(2*3) и 5/6 => 3/6 и 5/6

1/5 и 5/8 => (1*8)/(5*8) и (5*5)/(8*5) => 8/40 и 25/40

3/4 и 7/8 => (3*2)/(4*2) и 7/8 => 6/8 и 7/8

1/3 и 4/9 => (1*3)/(3*3) и 4/9 => 3/9 и 4/9

3/2 и 3/8 => (3*4)/(2*4) и 3/8 => 12/8 и 3/8

2/3 и 8/10 => (2*10)/(3*10) и (8*3)/(10*3) => 20/30 и 24/30

4/15 и 3/5 => 4/15 и (3*3)/(5*3) => 4/15 и 9/15

5/12 и 4/3 => 5/12 и (4*4)/(4*3) => 5/12 и 16/12