To find 5 percent of a number, multiply the number by 0.05. In this instance, 0.05 x 18 = 0.9 pounds.
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18 pounds - 20% = 14.4 pounds.
Ans = ₤18 * (1 - 10%) = ₤18 * (1 - 0.1) = ₤18 * (0.9) = ₤16.2
5 pounds * 50/100 = 2.50 pounds
It is: 5% of 900 = 45 pounds
5% of 100 pounds= 5% * 100= 0.05 * 100= 5 pounds