10% of $100 is $10. So 30% would be, 10 x 3. 30% of $100 is $30. If you are taking $30 off of $100, you will be left with $70.
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30% off of 15.00 dollars = (100-30)% of 15 dollars = 70 percent of 15.00 dollars = 15.00*70/100 = 10.50 dollars
30% off $100:= 30% discount applied to $100= $100 - 30% x $100= $100 - 0.30 x $100= $100 - $30= $70
When the full price is greater than 100 dollars.
30 percent off of $30 would be $9 off.
30% off is like only paying 70% (100-30) So 24 x 0.7 = 16.8 Answer: 16 dollars 80 cents