Question
If 40% of 'M' is 60 less than 30% of 'N', then determine
250% of 'N', given that (M + N) = 900Solution
ATQ, 0.4M + 60 = 0.3N Or, 60 = 0.3N - 0.4M ........ (I) Also, M + N = 900 Or, M = 900 - N ...... (II) Using equation (I) and (II), we have; 60 = 0.3N - 0.4(900 - N) Or, 60 = 0.3N - 360 + 0.4N Or, 420 = 0.7N So, N = 600 So, required value = 600 × 2.5 = 1500
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