1) (2/7) (5/6) = 10/42 = 5/212) (4/3) (5/9) = 20/273) (25/8) (-8/5) = -200/40 = -54) (-7/10) (-2/7) = 14/70 = 1/5
1) (2/7) (5/6) = 10/42 = 5/21
2) (4/3) (5/9) = 20/27
3) (25/8) (-8/5) = -200/40 = -5
4) (-7/10) (-2/7) = 14/70 = 1/5