What must be added to each term of the ratio 2 5 so that it may equal to 5 6 ........

Quant (SSC) Ratio, Proportion

What must be added to each term of the ratio 2 : 5 so that it may equal to 5 : 6 ?

Let's supposed added number be x. Then, the equation will be,
2 + x /5 + x = 5/6
⇒ 12 + 6x = 25 + 5x
Required number = x = 13.

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