How To Calculate A Percentage Change
This lesson covers:
- How to find what percentage a number has increased or decreased by
- E.g. 'A cat grows from 0.7 kg to 1.8 kg. What was the percentage increase in the cats mass?'
The price of a jacket increased from £8 to £10.
What percentage did the price increase by?
%
|
A new road shortens the journey time from Bristol to Bath, from 20 minutes, to 17 minutes.
What percentage did the length of the journey decrease by?
%
|
The value of a painting rises from £140,000 to £175,000.
Work out the percentage increase in the value of the painting.
%
|
Sarah bought a TV for £300. Three years later she sold it for £240.
Work out her percentage loss.
%
|
A car is travelling at 60 kilometres per hour. The car increases its speed to 69 kilometres per hour.
Calculate the percentage increase in the speed of the car.
%
|
Eric bought a lamp for £110. Four months later he sold the lamp for £154.
Calculate the percentage profit.
%
|
The population of Bristol in 2000 was 390,716. In 2019 the population was 467,099.
By what percentage did the population increase by?
(Give your answer correct to one decimal place)
%
|
In a sale the price of a dishwasher decreases from £500 to £410.
Work out the percentage decrease in price.
%
|