year 8 maths

250 Chapter 4 Fractions, decimals, percentages and financial mathematics
Exercise 4I
UNDERSTANDING AND FLUENCY
1–7 3–4(½), 5, 7–8(½) 5, 7–8(½), 9
1 Without using a calculator, evaluate the following.
a 10% of $50 b 10% of $160
c 10% of $250 d 10% of $700
e 10% of $15 f 10% of $88
g 10% of $5 h 10% of $2.50
2 Complete this table, without using a calculator.
Price (no GST) 10% GST Price (inc. GST)
a $ 100
b $ 50
c $ 150
d $ 5
e $ 1
f $ 120
Example 27
Example 28
Example 29
3 Calculate the GST payable on goods priced at:
a $680 b $4000 c $550
d $28 e $357 f $5.67
4 Calculate the final price, including the GST, on items priced at:
a $700 b $3000 c $450
d $34 e $56 700 f $4.90
5 If the GST is $8 , what was the original price?
6 The final advertised price of a pair of shoes is $99 . The GST included in this price is:
A $9.90 B $90 C $9 D $89.10
7 The final price to the consumer includes the 10% GST. Calculate the pre-GST price if the
final price is:
a $220 b $66 c $8800
d $121 e $110 f $0.99
8 Calculate the pre-GST price if the final cost to the consumer is:
a $352 b $1064.80 c $506
d $52.25 e $10 791 f $6.16
9 Copy and complete the table.
Pre-GST price 10% GST Final cost including the 10% GST
$ 599
$ 68
$ 70
$ 660
$ 789
$ 89.20
$ 709.50
$ 95.98
Cambridge Maths NSW
Stage 4 Year 8 Second edition
ISBN 978-1-108-46627-1 © Palmer et al. 2018
Cambridge University Press
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