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What number has to be added to numerator and denominator of 11 : 7 to make the ratio 9 : 7
  • Sandeep Reddy Komatireddy
    As we can see from ratios, denominator did not change. If add 7, then initial ratio becomes 18/14=9/7

    or

    (11+x)/(7+x) = 9/7

    next step is 7(11+x) = 9(7+x)

    after solving this we get x = 7
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