Question

1) a saloon car priced at $25000 is increased by 5%. what is the new price? 2) a shop is having a sale of computers. if a computer priced at $800 is reduced by 20%, what is the sale price?

3) a farmer produced 8000 tonnes of grain last year. he plans to increase this by 15% next year. how many tonnes does he think he will produce?
4) a winter coat is priced at $250 but is discounted by 15% in a sale. what is the sale price?
5) a builder charges $2000 plus 15% tax to fit a new kitchen. what is the total price of fitting the kitchen?
6) a family sees the kitchen they want priced at $7200 but it is offered at a discount of 40% in a sale. what is the sale price?​

Answer 1

1) $26,250

2) $640

3) 9200

4) $212.50

5) $2300

6) $4320

Explanation:

To increase a value:

convert the percent into decimal by dividing by 100. Add this to 1. Multiply this by the original value.

To decrease a value:

convert the percent into decimal by dividing by 100. Subtract this from 1. Mulitply this by the original value

1) 25000 x 1.05 = $26,250

2) 800 x 0.8 = $640

3) 8000 x 1.15 = 9200

4) 250 x 0.85 = $212.50

5) 2000 x 1.15 = $2300

6) 7200 x 0.6 = $4320