by what number should
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(4/7)^-2 =(7/4)^2= 49/16
let we divide 49/16 by x
then
49/16 × 1/X = 7/16
This gives X = 7
let we divide 49/16 by x
then
49/16 × 1/X = 7/16
This gives X = 7
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