1) New Value = €40 Multiplier = 100 - 20 = 80% 0.8 New Value = Original Value x Multiplier 40…
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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!
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3) New Value = €98.80 Multiplier = = 104% 1.04 New Value = Original Value x Multiplier = OV x ÷ 1.04 = OV OV = €95 Ticket price was originally €95!
Transcript of 1) New Value = €40 Multiplier = 100 - 20 = 80% 0.8 New Value = Original Value x Multiplier 40…
1)
New Value = €40Multiplier = 100 - 20 = 80% 0.8
New Value = Original Value x Multiplier40 = OV x 0.840 ÷ 0.8 = OV
OV = €50Ipod was originally €50!
2)
New Value = €17.25Multiplier = 100 + 15 = 115% 1.15
New Value = Original Value x Multiplier17.25 = OV x 1.1517.25 ÷ 1.15 = OV
OV = €15Box was originally €15!
3)
New Value = €98.80Multiplier = 100 + 4 = 104% 1.04
New Value = Original Value x Multiplier98.80 = OV x 1.0498.80 ÷ 1.04 = OV
OV = €95Ticket price was originally €95!
4)
New Value = 660mlMultiplier = 100 + 10 = 110% 1.1
New Value = Original Value x Multiplier660 = OV x 1.1660 ÷ 1.1 = OV
OV = 600mlNormal bottle contains 600ml!
5)
New Value = €264Multiplier = 100 + 20 = 120% 1.2
New Value = Original Value x Multiplier264 = OV x 1.2264 ÷ 1.2 = OV
OV = €220Katie’s pay was €220 per week before the
rise!
6)
New Value = 2.4mMultiplier = 100 - 4 = 96% 0.96
New Value = Original Value x Multiplier2.4 = OV x 0.962.4 ÷ 0.96 = OV
OV = 2.5mIvan’s best height is 2.5m!
7)
New Value = 31 biscuitsMultiplier = 100 + 24 = 124% 1.24
New Value = Original Value x Multiplier31 = OV x 1.2431 ÷ 1.24 = OV
OV = 25Before a packet had 25 biscuits!
8)
New Value = €66.70Multiplier = 100 + 15 = 115% 1.15
New Value = Original Value x Multiplier66.70 = OV x 1.1566.70 ÷ 1.15 = OV
OV = €58Delboy buys his goods at €58!
9)
New Value = 90kgMultiplier = 100 - 20 = 80% 0.8
New Value = Original Value x Multiplier90 = OV x 0.890 ÷ 0.8 = OVOV = 112.5kg
Vanessa weighed 112.5kg!
10)
New Value = €8400Multiplier = 100 - 30 = 70% 0.7
New Value = Original Value x Multiplier8400 = OV x 0.78400 ÷ 0.7 = OV
OV = €12000Price of car when new was €12000!
L.O. Be able to work out ANYPercentage Increase/Decrease question
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:
GIVEN: Original Value and New ValueMUST FIND: Percentage
GIVEN: Percentage and Original ValueMUST FIND: New Value
GIVEN: Percentage and New ValueMUST FIND: Original Value
Remember the method to find what you must find
New Value = Original Value x Multiplier
Original Value = New Value ÷ Multiplier
STP 9 Exercise 4e Pg 92-93
1,3,4,6,10,12
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