Percentage change
In January, a puppy weighed 4kg. Three months later, the same puppy weighed 5kg. What was the percentage increase in the puppy’s weight?
25%
Increase 80ml by 9%
87.2
20% of all the children in a class are left handed. 4 children are left handed. How many children are there in the class altogether?
20
Paul leaves £4000 in the bank for two years. It earns compound interest of 5% per year. Calculate the total amount Paul has in the bank at the end of the two years.
£4410
James invests £200 for 1 year in a bank account. The account pays simple interest at a rate of 3% per year. Work out the total amount of money in the account at the end of the year.
£206
In a sale the price of a sofa is reduced from £2500 to £2290 What is the percentage decrease?
8.4%
Last year, there were 20 students in a class. This year, there are 30% more students. How many students are in the class this year?
26
Swansea is a city in Wales. The population of Swansea is 240,000 This population is 7.5% of the total population of Wales. What is the total population of Wales?
3,200,000
A full water tank holds 500 litres. The tank begins to leak water and is losing 14% of its contents every hour. Find how much water is left in the tank after 8 hours.
149.609 litres
Faith invests £800 for 3 years in a bank account. The account pays simple interest at a rate of 0.4% per year Work out the total amount of interest Faith has got at the end of the 3 years
£9.60
The population of Bristol in 1921 was 367,831. In 2017, the population was 459,300. Calculate the percentage increase. Give your answer correct to one decimal place.
24.87
Iris spends £40 a month on water. By changing company, Iris can save 16%. How much would Iris pay each month?
£33.60
Sinead buys a watch. 20% VAT is added to the price of the watch. Sinead then has to pay a total of £60 What is the price of the watch with no VAT added?
£50
The number of people living on a remote island decreases by 9% every 10 years. In 1950 there were 18000 living on the island. Calculate how many less people will be living on the island in 2020.
8698
Jonah invests £400 in a bank account that pays 3.5% simple interest per year. At the end of each year Jonah spends of the interest and gives the rest to his brother. How much money does Jonah give to his brother each year?
£5.60
An empty bucket weighs 800g. The weight of the bucket increases to 3.3kg when Qilled with water. Calculate the percentage increase in the weight of the bucket.
312.5%
An empty [lowerpot has a mass of 800g. The mass of the [lowerpot increases to 4kg when [illed with soil. A different [lowerpot is 25% lighter but holds 40% more soil. Calculate the mass of this flowerpot when it is full of soil.
5.08kg
Miss Jenkins buys a car costing £11895 This cost includes VAT at a rate of 20% How much is the VAT?
£1982.50
A Nish tank, that is full of water, has sprung a leak. 12% of the water is lost every hour. What percentage of the water is lost after three hours?
31.85%
Percy invests £2000 for 4 years in a savings account that pays simple interest. At the end of the 4 years, Percy has £2140 in the account. Work out the annual rate of simple interest.
1.75%
ABCD is a rectangle with length 40cm and width 10cm. The length of the rectangle is decreased by 40%. The width of the rectangle is decreased by 20% Find the percentage decrease in the area of the rectangle
52%
An adult ticket for the cinema costs £13.40 A child ticket is half the price of an adult ticket. Mr and Mrs Henderson and their six children go to see a movie. Mrs Henderson has a voucher for 18% off. Work out how much Mrs Henderson pays for the tickets.
£54.94
There are 1500 people at an ice hockey match. The announcer says that this is exactly 30% more people than the previous match. Explain why the announcer is wrong.
That would mean at the previous match there were 1153.846… people, which is not possible.
The population of a country is increasing by 5% a year. How many years will it take the population of the country to double?
15 years
Nicole invested some money for 3 years into an account that pays 2% per year simple interest. She earned £7.20 interest in total. How much money did Nicole originally invest?
£120