Evaluate :
(i) 55% of 160 + 24% of 50 - 36% of 150
(ii) 9.3% of 500 - 4.8% of 250 - 2.5% of 240

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Solution

(i) 55% of 160 + 24% of 50 - 36% of 150
= $\frac{55 \times 160}{100} + \frac{24 \times 50}{100} - \frac{36 \times 150}{100}$
= $11 \times 8 + 12 - 18 \times 3 = 88 + 12 - 54 = 46$
(ii) 9.3% of 500 - 4.8% of 250 - 2.5% of 240
$\frac{9.3 \times 500}{100} - \frac{4.8 \times 250}{100} - \frac{2.5 \times 240}{100}$
$9.3 \times 5 - 1.2 \times 10 - 0.5 \times 12$
= 46.5 - 12 - 6 = 46.5 - 18 = 28.5

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