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Percentages: a visual approach
£200 0 10 20 30 40 50 60 70 80 90 100
£200 ??? 0 10 20 30 40 50 60 70 80 90 100
£200 ??? ??? 0 10 20 30 40 50 60 70 80 90 100
£200 ??? ??? How did you work it out? 0 10 20 30 40 50 60 70 80 90 100
£200 ??? ??? How did you work it out? Write down the steps in detail 0 10 20 30 40 50 60 70 80 90 100
£200 ??? ??? How did you work it out? Write down the steps in detail Try the next one… 0 10 20 30 40 50 60 70 80 90 100
The next problem…
£140 0 10 20 30 40 50 60 70 80 90 100
£140 ??? 0 10 20 30 40 50 60 70 80 90 100
£140 ??? ??? 0 10 20 30 40 50 60 70 80 90 100
It gets better   …
£180 0 10 20 30 40 50 60 70 80 90 100 110 120
£180 ??? 0 10 20 30 40 50 60 70 80 90 100 110 120
£180 ??? ??? 0 10 20 30 40 50 60 70 80 90 100 110 120
Another one…
£352.50 £??? 0 10 20 30 40 50 60 70 80 90 100 110 120
£352.50 £??? £??? 0 10 20 30 40 50 60 70 80 90 100 110 120
There’s more…
A laptop is marked as 10% off in a sale. The price is £540. What was the original cost of the laptop?
£540 A laptop is marked as 10% off in a sale. The  sale  price is £540. What was the original cost of the laptop? 0 10 20 30 40 50 60 70 80 90 100
£540 A laptop is marked as 10% off in a sale. The  sale  price is £540. What was the original cost of the laptop? £??? 0 10 20 30 40 50 60 70 80 90 100
The last one…
Algernon has received a 5% pay rise. His new wages are £18 275. What were Algernon’s wages  before  the pay rise? £18 275 ??? 0 10 20 30 40 50 60 70 80 90 100 110 120

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Reverse Percentages: a visual approach