Percentage increase and decrease
The Maths Habit
A coat is reduced by 50%. Then the new price goes up by 50%. Is it back to the original price?
No
Find 10% of
£90
£9£40
£4£250
£25£7
£0.70
- Multiplier
- The decimal you multiply by to increase or decrease an amount in one step.
Write the multiplier
Increase by 45%
1.45
Increase £40 by 15%
Answer£46
Increase £80 by 35%
Answer£108
Increase £40 by 15%
Answer£46
Increase £120 by 45%
Answer£174
Write the multiplier
Decrease by 8%
0.92
Decrease £90 by 20%
Answer£72
Decrease £50 by 30%
Answer£35
Decrease £90 by 20%
Answer£72
Decrease £250 by 40%
Answer£150
Decrease £90 by 20%
Answer£72
Decrease £40 by 70%
Answer£12
Decrease £90 by 20%
Answer£72
Increase £60 by 25%
Answer£75
Decrease £90 by 20%
Answer£72
Decrease £180 by 5%
Answer£171
Tom increases 50 by 10%, then increases his answer by 10%. Ana increases 50 by 20%. Who gets the bigger number?
TomThe value of a phone falls from £400 to £340. What percentage decrease is that?
15%A price is multiplied by 0.87. Is this an increase or a decrease? By what percentage?
a 13% decrease
A coat costs £80. It is reduced by 50%, then the new price is increased by 50%. What does it cost now?
£60
Increase £70 by 15%
£80.50An amount is multiplied by 0.94. Is this an increase or a decrease? By what percentage?
a 6% decrease
Exit tickets to print
