Answer:
$33.50
Explanation:
To find the original purchase price, write a proportion and solve.
A proportion is an equation where two ratios are set equal.
![(6.70)/(y)= (20)/(100)](https://img.qammunity.org/2020/formulas/mathematics/high-school/dx53eb8qb1znxfstf5z1h6pr29asblh4bx.png)
To solve for y, cross multiply the numerator and denominator of each fraction.
6.70(100) = 20y
670 = 20y
33.5 = y