N/D = Decimal/1

Decimal x 100 = ?/100

100 percent means everything (e.g 100/100 or 16/16). Per Meaning

*out of*and cent meaning

*100*, so a percent means a number out of 100.

To find 100 percent, you divide the number by 1, and it will give you 100% of that number.

example: 100% of 40 = ?

40/1 = 40

100% of 40 is 40

50 percent means half or 1/2 or 50/100.

To find 50 percent, you divide the number by 2, and it will give you 50% of that number.

example: 50% of 40 = ?

40/2 = 20

50% of 40 = 20

10% means 1/10 or 10/100.

To find 10 percent, you divide the number by 10, and it will give you 10 % of that number.

example: 10% of 40 = ?

40/10 = 4

10% of 40 = 4

25 percent means 1/4 or 25/100.

To find 25 percent, you divide the number by 4, and it will give you 25% of that number.

example: 25% of 40 = ?

40/4 = 10

25% of 40 = 10

1 percent means 1/100.

To find 1 percent, you divide the number by 100, and it will give you 1% of that number.

example: 1% of 40 = ?

40/100 = 0.40

1% of 40 = 0.40

Representing Percents

__180%__

__12.3/4%__

__0.6%__Converting Fractions to Decimals and Percents: 88/50

Numerator divide by the Denominator

88 divide by 50 = 1.76

1.76 x 100 = 176%

Converting Decimals to Percents and Fractions: 0.0064

0.0064/1 x 100/100 = 0.64/100 or 0.64%

64/10000 divide by 16/16 = 4/625

Converting Percents to Decimals and Fractions: 750%

750 divide 100 = 7.5

750/100 = 7.5 or 7 1/2

Show How You Know:

**(Mental Math)**

20% of 60: 60 ÷ 10 = 6

6 x 2 = 12

20% of 60 is

**12**

0.1% of 40: 40 ÷ 100 = 0.4

0.4 ÷ 10 = 0.04

0.1% of 40 is

**0.04**

**250% of 400: 400 = 100%**

400 ÷ 2 = 200 (50%)

200 x 5 = 1000

250% of 400 =

**1000**

**Calculator:**

**20% of 60 :**

**0.1% of 40: 250% of 400**

20÷100=0.2 0.1÷100=0.001 250÷100=2.5

0.2 x 60=12 0.001 x 40=0.04 2.5 x 400=1000

__20% of 60 is__

**12**0.1% of 40 is**0.04**250% of 400 is**1000**

__Question #3 on pg 148:__

a) 15 ÷ 100 = 0.15 b) 10 ÷ 100 = 0.1 c) 25 ÷ 100 = 0.25

0.15 x 200 = 30 0.1 x 230 = 23 0.25 x 200 = 50

30 + 200 = 230 23 + 230 = 253 50 + 200 = 250

Kyle is incorrect.

Discount - what you save

Sale Price - what you pay

Total Price - what you pay altogether with tax.

( Discount - Original Price = Sale Price) (Sale Price + Tax = Total Price)

Show How You Know pg 148

Which is a better buy? What is the final price?

Plate Collection $ 68.00

Store A: 50% off one day only

68 ÷ 2 = $34

Store B: 25% off one day followed by 25% off the reduced price the second day.

25 ÷ 100 = 0.25 $51 x 0.25 = $12.75

0.25 x 68 = $17 $51 - $ 12.75 = $38.25

$68 - $17 = $51

Store A has a better deal because it is less than Store B after the discount.

Video to help you learn more about percents.

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