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A sign says that the price marked on all music equitment is 30% off the original price. You buy an electric guitar for the sale price of $315. What is the original price?

User Yasiru G
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Answer:

$450 is the original price

Explanation:

We can create a proportion to find the sale on the original price. A proportion is an equation where two ratios are set equal to each other. We create two fractions using the prices and percents. It is marked down by 30% so we pay 70% of the original. The sale price is $315.


(70)/(100) =(315)/(x)

We begin solving by cross multiplying numerator to denominator of each fraction.


70(x)=100(315)\\70x=31500\\(70x)/(70)=(31500)/(70)  \\450=x


User Christophe Henry
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