Ans = ₤18 * (1 - 10%)
= ₤18 * (1 - 0.1)
= ₤18 * (0.9)
= ₤16.2
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15% * 18 pound = 2.70 pound.18 - 2.7 = 15.30 poundHowever if you misspelled and actually mean 15 percent of18, then the answer is 2.70 pound. ("off" means 18 minus 15% of 18)
10% off $18 = $18 - ( 0.1 x $18) = $16.2
18
10 ÷ 100 × 18 = 1.818 - 1.8 = $16.2
10% off 180= 10% discount applied to 180= 180 - (10% * 180)= 180 - 18= 162