1.5 times 9 equals 13.5. You can calculate it by multiplying 1.5 by 9 directly, which gives you the result of 13.5.
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It equals 285
The answer is... 15 !
15
15% off $15 = $15 - (0.15 x $15) = $15 - $2.25 = $12.75
45 - 15 - 15 = 15