£12, or 12 pounds
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30 of 40 is 75 percent.
30 * 40% = 30 * 0.40 = 12
20% of 30 pounds is calculated by taking 0.20 times 30 which equals 6. So 20 percent of 30 pounds is 6 pounds.
7.5% of 40= 7.5% * 40= 0.075 * 40= 37.5 percent of 40 = 37.5% of 40= 7.5% * 40= 0.075 * 40= 3
30% of 40 as a fraction = 12/1 30% of 40 = 30% * 40 = 30%/100% * 40 = 12/1