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प्रश्न
By what number should `(-5)/7` be divided so that the result is `(-15)/28`?
योग
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उत्तर
Consider the number as x
`(-5)/7 ÷ (-15)/28`
It can be written as
`(-5)/7 xx 1/x = (-15)/28`
By further calculation
`(-5)/(7x) = (-15)/28`
So we get
`x = 5/7 xx 28/15 = 4/3`
`x = 1 1/3`
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