Answer :
[tex] the \ original \ price : x \\ \\ x\cdot 20\% = 55 \\ \\x\cdot \frac{20}{100}=55\\ \\\frac{1}{5}x=55 \ \ / \cdot 5\\ \\x=\$ \ 275 \\ \\ Answer : \ the \ original \ price \ it \ \$ \ \ 275 .[/tex]
Since $55 would be 80% of the original (since it was 20% off) you would divide the $55 by 4 to get 1/5 if the original price ($13.75) and multiply it by 5 to get the original price. $13.75x5=$68.75
