if the product of 2 rational no. is 25/42 and one of them is -20/7 find the othr

Answer 1

x y = 25/42
x (-20/7) = 25/42

x = (25/42)(-7/20)

x = (5/4)(-7/42)

x = (5/4)(-1/6)

x = -5/24