logb(15/7)
= logb15 - logb7 Since, log (m/n) = log m - log n
= logb 5*3 - logb 7
= logb 5 + logb 3 - logb 7 Since, log mn = log m + log n
= 0.788 + 0.584 + 1.095 Putting the values
= 2.467 Answer
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