Sometimes we need to represent the same amount in different

ways.

For example, there are a number of different ways we could

represent one dollar.

One dollar could be:

1 loonie

4 quarters

10 dimes

• The ability to represent the same amount in different ways is important for mathematical operations as well.

• Converting between the three fundamental forms (decimal, percent, fraction) is where we will begin our study.

Suppose you scored 15 out of 20 on a quiz.

1520

This is the fraction form of your result

To convert to decimal, perform the division 15 / 20. You may use a

calculator for these if you need to.

= 0.75

To convert to percent, multiply the decimal by 100

0.75 X 100 = 75%

A few more examples:

1316

= 0.8125 = 81.25%

1820

= 0.9 = 90%(divided) (Multiplied

by 100%)

Convert the following(try them first, then click to see the

answer)Fraction Decimal Percent

0.75 75

100 3

4=

75%?

Fully reduce all fractions!!!

?

Convert the following

Fraction Decimal Percent

0.2 3

15 1

5=

20%

?

? ?

Convert the following

Fraction Decimal Percent

0.45 45

100 9

20=

45%? ?

Convert the following

Fraction Decimal Percent

0.43 3

743%? ?

Convert the following

Fraction Decimal Percent

1.22 122

100122%

61

50= ?

? ?

See Sheet

Remember:

• Fractions represent part of a whole.

• A Fraction is a division statement

• For Decimals:

5 1 7 . 3 7 9

Percent (out of 100)

• 33% = 33 / 100

• 79% = 79 / 100

• Putting it all together….