Find/Express %
Percentage Change
Increase & Decrease
Unitary Method
GST
100

Mr Truong beat Miss Lee in Mario Kart 6 times out of 15 games. Calculate his winning percentage.

40%

100

Calculate the percentage loss if an item is bought for $108 and sold for $72 (correct to 1dp.)

33.3%

100

An item costs $65 and is marked up by 12%. Calculate the new price of the item.

$72.80

100

15% of an amount is $80. Calculate 100% of the amount.

$533.33

100

Calculate the GST to be added on an item that is originally priced at $57

$5.70
200

A square has side length 4 cm. If each side is increased by 75%, by what percent is the area of the new square bigger than the original?

306.25%
200

Mr Eddleston bought a pram for $160. Once baby Alexander grew older, he decides to sell the pram for $100.

Calculate the percentage change & specify if this was a profit or a loss.

37.5% loss

200

Mrs Tanios bought a TV for $3510. After a few years, she decides to sell it at a loss of 32%. Calculate the new selling price of the TV.

$2386.80

200

53% of an amount of money is $42. How much is 100% of the amount?

$79.25

200

GST in Italy is 22%. How much more GST is charged in Italy than Australia on an item that is originally priced at $128.50?

$15.42
300

Ms Edwards bought a pack of 14 lightbulbs. If 4 were faulty, what percentage of the pack are not faulty? (answer correct to 1 dp.)

71.4%

300

Mr Abi-Elias bought a computer for $760 and sold it for $535. Calculate his loss as a percentage of the selling price (correct to 1dp.)

42.1%

300

A shop offered a 25% discount on a pair of shoes that originally sold for $90. The new price was then reduced by 10%.

Calculate the final sale price.

$60.75

300

The price of a car has been discounted by 20%. If the discounted price was $16 500, what was the original price of the car?

$20 625

300

Calculate the pre-GST price of an item that is sold for $534.70

$486.09

400

In a group of students, 55% are girls and 79% of the girls play sport. What percentage of the group are girls who play sport?

43.45%

400

Mrs Pachos earns a salary of $360 per week for a 44 hour week. Her weekly salary is increased by 15% and her hours are reduced by 10%.

Calculate her new hourly pay & her total monthly pay (assume 4 weeks in a month).

$10.45/hr

$1655.28/month

400

Dr Vranesevic sells an item for $450 but decides to increase the price by 14%. When she suddenly needed to get rid of the item, she decided to reduce the price by 32%. How much more/less is the item worth now?

$101.16 less

400

Miss Lee bought a book that was discounted by 15%. If it was reduced by $5.80, how much did Miss Lee pay for the book?

$32.87

400

GST in Italy is 22%. How much more than Australia will Italy sell an item that is originally priced at $985?

$118.20

500
Ms Hartnett's football team won 25 games and lost 30 games this season. There are 25 more games left this season and they need a winning percentage of 60% to qualify for Nationals.

How many more games will they need to win in order to quality?

At least 23 games

500

The length of a rectangle is increased by 15% and the width is decreased by 20%. By what percentage is the new area smaller/larger than the original rectangle?

8% less

500

Mrs Renwick bought an item for $50. She was offered successive discounts of 5%, 10% & 20% in any order she wanted.

Which order would result in paying the least amount for her item?

Since multiplication is associative, the order does not matter. It will cost her $34.20 no matter the order.

500

Which is the best buy?

A. 200g for $2.20

B. 1.5kg for $15.80

C. 5kg for $54.00

B. 1.5kg for $15.80

500

Mrs Green went shopping in America and bought a lot of items seeing how cheaply they were priced. When she went to pay, she realised the GST had not been added to the items. The GST is charged at 7.5% and she wanted to buy a jacket, pants, coat and shoes priced at $112, $67, $205 and $98. She also 

If she had $500, will she have enough money to buy everything? How much will she have left/need more?

She will not have enough and needs $18.15 more.

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