# Thread: [SOLVED] use proportion to solve percents?..trying to help child with her homework!!!

1. ## [SOLVED] use proportion to solve percents?..trying to help child with her homework!!!

1. a mat was reduced by 25% or 55 dollars from its origional price. what was the origional price?

2. a man bought a jacket at a cost of 89 dollars a jacket. he sells them for 111.25 per jacket. what was his percent of mark-up?

3. a pair of boots bought online. the cost was 141.60. this included a duty tax of 21.60. calculate the percent duty charged on the boots.

4. mr. kim is a real estate broker. his salary is 2650 per month, plus 0.25% of sales. to earn 5000.00 in a month, how much does he need to sell.

2. Originally Posted by anndodo
1. a mat was reduced by 25% or 55 dollars from its origional price. what was the origional price?

2. a man bought a jacket at a cost of 89 dollars a jacket. he sells them for 111.25 per jacket. what was his percent of mark-up?

3. a pair of boots bought online. the cost was 141.60. this included a duty tax of 21.60. calculate the percent duty charged on the boots.

4. mr. kim is a real estate broker. his salary is 2650 per month, plus 0.25% of sales. to earn 5000.00 in a month, how much does he need to sell.
Hello again ann,

Problem 1:

Let x = original price

Let x - 55 = amount the mat was reduced to

Let x - .25x = amount the mat was reduced to

x - 55 = x - .25x

Solve for x.

Problem 2:

Let 89 = cost of jacket

Let 111.25 = selling price

Let 111.25 - 89 = 22.25 = the amount of markup

Let $\displaystyle \frac{22.25}{89}=.25=25$% = per cent of markup.

Problem 3:

Let 141.60 = cost of boots plus duty

Let 21.60 = duty

Let 141.60 - 21.60= 120 = cost of boots alone

Let $\displaystyle \frac{21.60}{120}=.18=18$% = per cent duty charged on the boots.

Problem 4:

Let 2650 = Kim's salary

Let x = amount of sales needed

2650 + .25x = 5000

Solve for x to get the amount he needs to sell to obtain a \$5000 monthly salary.

3. thank you!!!!!!!!!!!!!!