Three money word problems

Question

1) A purchase of office supplies cost $78.82 which included 13% HST. How much did the office supplies cost before tax and how much was the HST?

2) Aleaha’s company sold 91 cell phones this month and 77 cell phones last month. What is the percent change in the amount of cell phones sold from last month to this month?

3) A clothing store sells a dress pants for $55.60. During a sale the dress pants are reduced by 25%.

a) What is the reduced sale price of the dress pants?

b) What will be the total price of the dress pants (use the sale price) after taxes of 13% are added?

Answer 1

1) x + 0.13x = 78.82; 1.13x = 78.82; x = 78.82/1.13 = $69.75

0.13x = $9.07

2) Percent change Δx/x·100% = (91 - 77)/77·100% = 18.2%

3) a) x = 0.75·55.60 = $41.70

b) Price after TAX x = 1.13·41.70 = $47.12