Fractions / decimals / percentages
Write ½ as a decimal and a percentage.
0.5, 50%
Find 10% of 80.
8
Increase £40 by 10%.
£44
£400 is invested at 3% simple interest per year for 2 years. Find the amount of interest after 2 years.
£24
A T-shirt costs £36 after a 10% discount. What was its original price?
£40
Write 0.7 as a fraction in its simplest form and as a percentage.
7/10, 70%
Find ¾ of £60.
£45
Decrease 120 by 25%.
£90
£500 is invested at 4% simple interest per year for 3 years. Find the total amount in the account after 3 years.
£560
A number increases by 20% to become 72. Find the original number.
60
Write 45% as a decimal and a fraction in its simplest form.
0.45, 9/20
Find 0.35 of 200.
70
A coat costs £80. Its price increases by 15%. Find the new price.
£92
£300 is invested at 10% compound interest per year. Find the total amount after 6 years.
£531.47
A coat costs £60 after a 25% discount. What was its original price?
£80
Write 7/20 as a decimal and a percentage.
A pie chart shows the favourite after-school activities of 120 pupils.
The section of the pie chart for football takes up 75 ° of the whole circle.
How many pupils chose football?
25
A bicycle costs £250. Its price is reduced by 18%. Find the sale price.
£205
A car bought for £15000 depreciates at 5% per year. Calculate the value of the car after 5 years.
£11606.71
A website reviews all the restaurants in a town from 1 star (terrible) to 5 stars (excellent). The results are put on a pie chart with one segment of the pie being for each star rating i.e. 1 star, 2 stars, 3 stars, 4 stars and 5 stars.
The segment for 4 stars is 108° and 9 restaurants received a 4 star rating.
Calculate the total number of restaurants in the town.
30
Write 0.375 as a fraction in its simplest form and as a percentage.
3/8, 37.5%
A school has 240 pupils. ⅜ of them travel to school by bus.
Of those who travel by bus, 20% are in Year 11.
How many Year 11 pupils travel by bus?
18 pupils
A new games console is valued at £160. When it is first released its price is increased by 15% due to popular demand.
After a year a different console is released so the price of this console is decreased by 20% to encourage kids to continue buying it.
Find the final price of the console.
£147.20
The population of an endangered species of tiger is currently 234 and is predicted to decrease at a rate of 18% per year. Riley thinks there will be fewer than 100 tigers left in 5 years’ time. Assuming the predicted decrease will happen, is she correct?
234×(0.82)⁵=87 tigers, to the nearest whole number
This is less than 100, therefore Riley is correct.
Nicole invested some money for 3 years into an account that pays 2% simple interest. She earned £7.20 simple interest in total.
How much money did Nicole originally invest?
£120