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katrin [286]
3 years ago
14

The cost of a DVD box set increase from 30 to 35 a student says that this represent a 5% increase in the price explain the stude

nts error what is the actual percent increase
Mathematics
1 answer:
tamaranim1 [39]3 years ago
8 0
So it went from 30 to 35, or 5 bucks, if we take 30 to be the 100%, what is 5 off of it in percentage?

\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
30&100\\
5&p
\end{array}\implies \cfrac{30}{5}=\cfrac{100}{p}\implies p=\cfrac{5\cdot 100}{30}
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