Proportional relationships

Question

A store manager paid $40 for a shirt and as a markup of 20% during a store sale the manager marks the cost of the shirt down by 20% what is the percent of change from the original cost $40 to the sale price

Answer 1

The original cost of the shirt is $40.

 

Taking 20% off is the same as multiplying by 80% or 0.8:  40(0.8) = $32.

 

The sale price is then $32.

 

The percent change is found using the formula:

 

(amount of change)/(original amount) × 100 = 8/40 × 100 = 20%.

 

This was the amount of the markdown, and did not need to be calculated separately. Is this what you needed?