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90% —> $675
100% —> 10/9 x $675 =$750
70% of $750(remember that 750 is the original price and is 100%)—>$525
Ans—> $750-$525 =$225
100% —> 10/9 x $675 =$750
70% of $750(remember that 750 is the original price and is 100%)—>$525
Ans—> $750-$525 =$225