Question

A planner at Barnes and Noble originally cost $10. During the weekend, the planner went on sale for $9. What is the price markdown (percent of change)?

Answer 1

`\text{percentage change =}\frac{new\text{ cost -original cost}}{\text{original cost}}*100^{(0)/(\square_0)}`

new cost = $9

original cost = $10

Substitute the value into the formula;

`\text{percentage change =}(10-9)/(10)*100^{}`

= 1/10 x 100%

= 10%