Percentages
1The screen shot shows the calculator converting 25% to a fraction.
Enter 25% by pressing 25SHIFT(followed by pto check the value of 25% as a fraction.
2Express each percentage as a fraction.
A 50% | B 75% | C 40% | D 5% | E 100% | |||||
F 200% | G | 1 | % | H 1.5% | I | 1 | % | J 35% | |
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3Express each percentage as a decimal.
Hint! Express the percentage as a fraction then press the nbutton.
A 45% | B 79% | C 5% | D 7.5% | E 2 | 1 | % | |
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F 245% | G 1000% | H 1% | I 120.5% | J 11 | 1 % | ||
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4The 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%.
5The 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’?
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2A |
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| 1 | E 1 F 2 G | 1 |
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| 3 | I | 1 | J | 7 |
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| 5 | 20 | 200 | 200 | 400 | 20 | |||||||||||||||||
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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 |
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5$140.25
© Sue Thomson and Shriro Australia PTY Limited. This page may be photocopied for classroom use.
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