Product of two rational numbers is 25/42 and one of them is -20/7 find the other
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given,first rational number= -20/7
let the second be x
a/q,
-20/6 × x=25/42
-20x/6 = 25/42
-20x= 25/42 ×6
-20x =25/7
x= 25/7× 1/20
x =5/28
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