November 17, 20101) Write your homework in your agenda:

2) Open your agenda to your behavior card.

ConversionsBeing able to use fractions, decimals

and percents interchangeably

Rational numbers (decimals, fractions, and percents)

What am I Learning Today?

How will I show that I learned it?

To understand and use rational numbers to convert between fractions, decimals, and

percents.

What exactly is a percent?

• You can remember that percent means “per hundred.” For example, 8% means “8 per hundred,” or “8 out of 100.”

• Most states charge sales tax on items you purchase. Sales tax is a percent of the item’s price. A percent is a ratio of a number to 100.

Fractions

PercentsDecimals

2 5

40% .40

Fractions

PercentsDecimals

2 5

40% .40

Questions Answers

- Move the decimal point two places to the left.- Drop the percent sign.

*This is the same as dividing by 100.

How do I change from a percent to a decimal?

19 % =

Change the percent to a decimal.

.19

4 % =

.04

17 % =

.17

Fractions

PercentsDecimals

2 5

40% .40

Questions Answers

- Replace the % with a decimal - Move the decimal point two places to the right- Attach a percent sign

*This is the same as multiplying by 100.

How do I change from a decimal to a percent?

Decimal to Percent

Flip Book

Move your decimal 2 places to the right and

add a % sign

EX: 0.67 =

.5 =

Change the decimal to a percent.

50% .02 =

2 % 1.3 =

130 %

Fractions

PercentsDecimals

2 5

40% .40

Questions Answers

- Move the decimal point two places to the left.- Drop the percent sign.

*This is the same as dividing by 100.

How do I change from a percent to a decimal?

Percent to Decimal

Flip Book

Drop the %, move the decimal 2 places to the

left.

EX: 65% =

19 % =

Change the percent to a decimal.

.19

4 % =

.04

17 % =

.17

Fractions

PercentsDecimals

2 5

40% .40

Questions Answers

- Write it as you would read it- The number itself is the numerator- The denominator is the place value- SIMPLIFY

How do I change from a decimal to a fraction?

Decimals to Fractions

Flip Book

Write the number as the numerator over its

place value & simplify

EX: 0.45 =

.43 =

Change the decimal to a fraction:

43100

.01 = 1100

Fractions

PercentsDecimals

2 5

40% .40

Questions Answers

- Divide the denominator into the numerator.- Try to divide out to the thousandths place to see if it’s a terminating or repeating decimal

How do I change from a fraction to a decimal?

Fractions to Decimals

Flip Book

Divide the denominator into the numerator

EX: 2/5 =

Change the fraction to a decimal:

=

4 5 0.8

7 8 =

0.875

2 5

40% .40

Fractions

PercentsDecimals

Questions Answers

- Put the number over 100 and reduce- Drop the percent sign.

*Remember, “percent” means “per hundred”

How do I change from a percent to a fraction?

Percents to Fractions

Flip Book

Write the number over 100 & simplify

EX: 96% =

32 % =

Change the percent to a fraction:

32100

=

1650

35% =

35100

=

720

8=25

2 5

40% .40

Fractions

PercentsDecimals

Questions Answers

- Convert fraction to a decimal number by dividing the numerator by the denominator- Move the decimal point two places to the right.- Attach a percent sign.

How do I change from a fraction to a percent?

Fractions to Percents

Flip Book

Change the fraction to a decimal, then to a percent by moving the decimal 2

places to the right

EX: 1/2 =

Change the fraction to a percent:

3 15 = 15 ) 3 = 0.2 = 20%

5 8 = 8 ) 5 = 0.625 = 62.5%

Convert to a fraction:1.

3.

5.

Convert to a percent:

Convert to a decimal:

.23

.23 70%

15

70% 15

2.

4.

6.

23100

710

23% 0.2 = 20%

0.7 0.2