• # question_answer7) Find (a) 15% of 250                    (b) 1% of 1 hour                (c) 20% of  2500              (d) 75% of 1kg.

(a) 15% of $250=\frac{15}{100}\times 250=\frac{75}{2}=37.5$                 (b) 1% of 1 hour $\text{= }\frac{\text{1}}{\text{100}}\text{ }\!\!\times\!\!\text{ 1 hour}$ $\text{ = }\frac{\text{1}}{\text{100}}\text{ hour = }\frac{\text{3}}{\text{5}}$ minute or 36 sec. (c) 20% of   2500 = $\frac{20}{100}\times 2500=$ 500 (d) 75% of $\text{1 kg =}\frac{\text{75}}{\text{100}}\text{ }\!\!\times\!\!\text{ 1 kg = }\frac{\text{3}}{\text{4}}\text{kg = 750g}$

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