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%

2

4

 

 

 

 

 

 

 

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

%

2

 

 

 

 

 

 

F 245%

G 1000%

H 1%

I 120.5%

J 11

1 %

 

 

 

 

 

2

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’?

Answers

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2A

 

1

 

B

3

 

C

 

2

 

D

 

1

E 1 F 2 G

1

 

H

 

3

I

1

J

7

 

2

 

 

5

20

200

200

400

20

 

 

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.

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Casio FX-82AU PLUS manual 45% 79% 245% 1000% 120.5%, F 2 G, 075 025 F 205 J 93.75 $84 84.375, $140.25
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FX-82AU PLUS specifications

The Casio FX-82AU PLUS is a powerful scientific calculator designed specifically for students and professionals alike who require advanced mathematical functions and features. Renowned for its reliability and user-friendly interface, this calculator has become a staple in classrooms and workplaces around the globe.

One of the standout features of the Casio FX-82AU PLUS is its extensive range of functions. The calculator supports over 250 functions, making it capable of handling a variety of tasks in mathematics, physics, and engineering. These functions include everything from basic arithmetic operations to more complex calculations such as trigonometry, statistics, and calculus. This versatility makes it an ideal choice for high school students, university undergraduates, and professionals.

The FX-82AU PLUS boasts a natural textbook display, which allows users to view expressions and results in a format similar to how they appear in textbooks. This feature enhances understanding and reduces errors, making it easier for users to verify their calculations. The calculator also incorporates a two-line display, allowing users to see both the input and result simultaneously, fostering a seamless calculation experience.

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In terms of design, the Casio FX-82AU PLUS maintains a compact and lightweight profile, making it portable and convenient for students and professionals who are always on the go. Its ergonomic layout ensures comfort during prolonged use, allowing users to navigate through functions without unnecessary strain.

In summary, the Casio FX-82AU PLUS is more than just a calculator; it is a comprehensive tool that enhances mathematical learning and professional efficiency. Its wide range of functions, natural textbook display, and durable design set it apart as a preferred choice in the scientific calculator category, making it an essential tool for anyone engaged in mathematics or related fields.
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