1. New Value = €40 Multiplier = 100 - 20 = 80%  0.81)
New Value = €40
Multiplier = = 80%  0.8
New Value = Original Value x Multiplier
40 = OV x 0.8
40 ÷ 0.8 = OV
OV = €50
Ipod was originally €50!

2. New Value = €17.25 Multiplier = 100 + 15 = 115%  1.152)
New Value = €17.25
Multiplier = = 115%  1.15
New Value = Original Value x Multiplier
17.25 = OV x 1.15
17.25 ÷ 1.15 = OV
OV = €15
Box was originally €15!

3. Ticket price was originally €95!3)
New Value = €98.80
Multiplier = = 104%  1.04
New Value = Original Value x Multiplier
98.80 = OV x 1.04
98.80 ÷ 1.04 = OV
OV = €95
Ticket price was originally €95!

4. Normal bottle contains 600ml!4)
New Value = 660ml
Multiplier = = 110%  1.1
New Value = Original Value x Multiplier
660 = OV x 1.1
660 ÷ 1.1 = OV
OV = 600ml
Normal bottle contains 600ml!

5. Katie’s pay was €220 per week before the rise!5)
New Value = €264
Multiplier = = 120%  1.2
New Value = Original Value x Multiplier
264 = OV x 1.2
264 ÷ 1.2 = OV
OV = €220
Katie’s pay was €220 per week before the rise!

6. New Value = 2.4m Multiplier = 100 - 4 = 96%  0.966)
New Value = 2.4m
Multiplier = = 96%  0.96
New Value = Original Value x Multiplier
2.4 = OV x 0.96
2.4 ÷ 0.96 = OV
OV = 2.5m
Ivan’s best height is 2.5m!

7. Before a packet had 25 biscuits!7)
New Value = 31 biscuits
Multiplier = = 124%  1.24
New Value = Original Value x Multiplier
31 = OV x 1.24
31 ÷ 1.24 = OV
OV = 25
Before a packet had 25 biscuits!

8. Delboy buys his goods at €58!8)
New Value = €66.70
Multiplier = = 115%  1.15
New Value = Original Value x Multiplier
66.70 = OV x 1.15
66.70 ÷ 1.15 = OV
OV = €58
Delboy buys his goods at €58!

9. New Value = 90kg Multiplier = 100 - 20 = 80%  0.89)
New Value = 90kg
Multiplier = = 80%  0.8
New Value = Original Value x Multiplier
90 = OV x 0.8
90 ÷ 0.8 = OV
OV = 112.5kg
Vanessa weighed 112.5kg!

10. Price of car when new was €12000!
10)
New Value = €8400
Multiplier = = 70%  0.7
New Value = Original Value x Multiplier
8400 = OV x 0.7
8400 ÷ 0.7 = OV
OV = €12000
Price of car when new was €12000!