Question

by what rational number should we multiply -15/56 to get -5/7

Answer 1

hey there
let r be the rational number
-15/56 x r = -5/7
therefore, r= -5/7 x 56/-15
r= 8/3
hope that helps!

Answer 2

$let \: the \: number \: be \: x. \\ ( - \frac{15}{56 } \times x) = ( - \frac{5}{7} ) \\ = > x = ( - \frac{5}{7} )\times ( - \frac{56}{15} ) \\ = \frac{8}{3}$
Hope this will help you....


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