PRE-ALGEBRA, 2008
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72 is being compared to 160.
So,72 is the part and 160 is the whole.
Let n represent the percent.
The percent proportion is .
Apply cross product property of equality: then .
(Multiply: )
Apply division property of equality: Divide each side by 160.
(Cancel common terms)
(Divide: )
72 is 45 of 160.
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