Answer:
Percentage change= 20%
Step-by-step explanation:
Giving the following information:
Selling price before tax= $5
Tax= $1
Selling price after tax= $6
To calculate the percentage increase, we need to use the following formula:
Percentage change= [(Selling price after tax - Selling price before tax)/Selling price before tax]*100
Percentage change= [(6 - 5)/5]*100
Percentage change= 20%