1 New Value 40 Multiplier 100 20 80

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1) New Value = € 40 Multiplier = 100 - 20 = 80% 0.

1) New Value = € 40 Multiplier = 100 - 20 = 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%

2) New Value = € 17. 25 Multiplier = 100 + 15 = 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) New Value = € 98. 80 Multiplier = 100 + 4 = 104%

3) New Value = € 98. 80 Multiplier = 100 + 4 = 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) New Value = 660 ml Multiplier = 100 + 10 = 110% 1.

4) New Value = 660 ml Multiplier = 100 + 10 = 110% 1. 1 New Value = Original Value x Multiplier 660 = OV x 1. 1 660 ÷ 1. 1 = OV OV = 600 ml Normal bottle contains 600 ml!

5) New Value = € 264 Multiplier = 100 + 20 = 120% 1.

5) New Value = € 264 Multiplier = 100 + 20 = 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. 4 m Multiplier = 100 - 4 = 96%

6) New Value = 2. 4 m Multiplier = 100 - 4 = 96% 0. 96 New Value = Original Value x Multiplier 2. 4 = OV x 0. 96 2. 4 ÷ 0. 96 = OV OV = 2. 5 m Ivan’s best height is 2. 5 m!

7) New Value = 31 biscuits Multiplier = 100 + 24 = 124% 1.

7) New Value = 31 biscuits Multiplier = 100 + 24 = 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) New Value = € 66. 70 Multiplier = 100 + 15 = 115%

8) New Value = € 66. 70 Multiplier = 100 + 15 = 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 = 90 kg Multiplier = 100 - 20 = 80% 0.

9) New Value = 90 kg Multiplier = 100 - 20 = 80% 0. 8 New Value = Original Value x Multiplier 90 = OV x 0. 8 90 ÷ 0. 8 = OV OV = 112. 5 kg Vanessa weighed 112. 5 kg!

10) New Value = € 8400 Multiplier = 100 - 30 = 70% 0.

10) New Value = € 8400 Multiplier = 100 - 30 = 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!

L. O. Be able to work out ANY Percentage Increase/Decrease question

L. O. Be able to work out ANY Percentage Increase/Decrease question

Identify the Type Find the percentage ? Find the new value? Find the original

Identify the Type Find the percentage ? Find the new value? Find the original value?

Read the Question and identify what you are given and what you must find:

Read the Question and identify what you are given and what you must find: GIVEN: Original Value and New Value MUST FIND: Percentage GIVEN: Percentage and Original Value MUST FIND: New Value GIVEN: Percentage and New Value MUST FIND: Original Value

Remember the method to find what you must find

Remember the method to find what you must find

STP 9 Exercise 4 e Pg 9293 1, 3, 4, 6, 10, 12

STP 9 Exercise 4 e Pg 9293 1, 3, 4, 6, 10, 12

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