Question

2) A book that was 20% off is now $16. What was the original cost? A $24 B$36 C $28 D $20

Answer 1

The original price of the book shall be represented by x.

The book was sold at a price of $16, which is 20% off its original.

This means x is 100%, while 16 is 80%. Therefore;

`\begin{gathered} \text{Original cost can be }\det er\min ed\text{ by the equation;} \\ (80)/(100)=(16)/(x) \\ \text{Cross multiply and you have,} \\ x=(100*16)/(80) \\ x=20 \end{gathered}`

Therefore, the original price is $20

The correct answer is option D