20% off of 30 = 24
= 20% discount applied to 30
= 30 - (20% * 30)
= 30 - (0.20 * 30)
= 30 - 6
= 24
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30% of 20 is 6.
30% off of 20 dollars = 70% of 20 dollars = 20*70/100 = 14 dollars.
$30 off, which makes the item $20.
20 percent is lower than 30 percent.
The fastest way to take 20 percent off a number is to multiply the original number by 0.8 20% of 30 is 6. 30 - 6 = 24 30 x 0.8 = 24