Percentages - Casio FX-82AU PLUS Using Manual

1 The screen shot shows the calculator converting 25% to a fraction.
Enter 25% by pressing 25SHIFT( followed by p to check the value of
25% as a fraction.
2 Express each percentage as a fraction.
A 50%
F 200%
3 Express each percentage as a decimal.
Hint! Express the percentage as a fraction then press the n button.
A 45%
F 245%
4 The screen shot shows the solution to the problem 'Increase 40 by 10%'.
Check the calculation by pressing 40+10SHIFT(O40p.
Determine the following amounts.
A Increase 60 by 10%.
B Increase 75 by 25%.
C Decrease 80 by 20%. (Hint! Remember decrease means make smaller.)
D Decrease $120 by 30%.
E Increase $90 by 25% then decrease the result by 25%.
5 The local sports store is having a '15% off sale'. Gillian is going to buy a pair of
running shoes that normally cost $165. How much will the running shoes cost in
the '15% off sale'?
Answers
3
1
2A B C
2 4
3A 0.45 B 0.79 C 0.05 D 0.075 E 0.025 F 2.45 G 10 H 0.01 I 1.205 J 0.115
4A 66 B 93.75 C 64 D $84 E 84.375
5 $140.25
© Sue Thomson and Shriro Australia PTY Limited. This page may be photocopied for classroom use.
Percentages
B 75% C 40%
1
G % H 1.5%
2
B 79% C 5%
G 1000% H 1%
2 1
D E 1 F 2 G
5 20
D 5% E 100%
1
I % J 35%
4
D 7.5% E
I 120.5% J
3
1 1
H I
200 200 400
1
%
2
2
1
%
11
2
7
J
20
21