Answer:
80%
solution,
Old price (P1)=$15
New price(P2)=$27
percent increase:
[tex]( \frac{p2 - p1}{p1} ) \times 100 \: percent \\ = ( \frac{27 - 15}{15} ) \times 100 \: percent \\ = ( \frac{12}{15} ) \times 100 \: percent \\ = 80 \: percent[/tex]
Hope this helps...
Good luck on your assignment...
