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Week 21 8th Grade Math Vocabulary.pptx

Published Feb 10, 2013 in Education

8th Grade Math Vocabulary 21. This power point covers discount, percentage, interest, commission, tip, base, principal, and percent proportion.

by UVOICE

### Steffanie & Jan Hospitals Presentation PPTX

Published April 13, 2013 under Progamming

by UVOICE

### Steffanie & Jan Hospitals Presentation PPTX

Published April 13, 2013 in Progamming

by UVOICE

### Steffanie & Jan Hospitals Presentation PPTX

Published April 13, 2013 in Progamming

### Presentation Slides & Transcript

#### Presentation Slides & Transcript

Week 21

Percentage
A number divided by 100.
It is the number of parts out of 100 of something.

Percentage
For example, a quarter (25 cents) is 25 percent of a dollar (100 cents).

A quarter = 25 cents

A dollar = 100 cents

Percentage
A quarter (25 cents) is 25 percent of a dollar (100 cents).

The fraction 25/100 is 25 percent, sometimes written as 25%

Discount
A decrease in the regular price.

Discount
A decrease in the regular price.

Discount
A decrease in the regular price.
Ex. Sale 20% Off

Regular Price is \$50

Discount

20% of \$50
.20 x \$50

Discount
\$50
X .20
___________
00
1000
___________________
1000
Starting from far right move decimal 2 spaces left.
\$10.00

Discount
\$50 original price
\$10 Discount
____________________
New Price \$40

Commission
Money earned based on a percent of sales.

Commission
For example, I am a salesman at a hardware store, and I earn 10% commission on the sales that I make.

Commission
If I sell \$3200 of merchandise at the store today, how much will I earn in commission?

Commision
To figure out what 10% commission is on \$3200 of sales multiply \$3200 by .10

Commission
\$3200
X .10
_________________
0
32000
_____________________
32000

Starting from far right move decimal 2 spaces left.

\$320

Tip
Money given for a job well done.

Tip
Be sure to give your waiter a 20% tip if he does a good job.

Tip
My restaurant check is
\$76

Tip
If I give the waiter a 20% tip, how much tip does the waiter get?

Tip
\$76
x.20
_____________
0
1520
_______________
1520
____________________
\$15.20 Tip for the waiter

Tip + Check Amount = Total Owed
\$76 .00 Check Amount
\$15.20 Tip
______________
\$91.20 Total Owed

Base
In a percent proportion, the whole quantity, or the number to which the part is being compared.

Base
4 out of 10 people wear glasses.
4:10
or
4/10
10 is the BASE

Percent Proportion
A proportion or an equation made up of two fractions to solve percent problems.

What is 20% of 10?

Percent Proportion
What is 20% of 10?

10
X .20
__________________
0
200
_________________________
200
Starting from far right move decimal 2 spaces left.
2.00

Percent Proportion
What is 20% of 10?

2/10 = 20/100 = 20%

2 is the part
10 is the base
20 is the percent

Interest
Money you can earn on money in a bank account or money you have to pay on a bank loan.

Interest
For example, if I can earn 2.5% interest per year on money deposited and I deposit \$100,000 how much money in interest will I earn in 1 year?

Interest
\$100,000
X .025 (2.5%)
_____________
500000
2000000
00000000
__________________
2500000
Starting from far right move decimal 3 spaces left.
\$2,500.00 interest in 1 year earned

Principal
The starting amount to which Interest is added.
For example, the original amount that is borrowed in a loan is the principal of that loan.

Principal

For example, if one borrows \$100,000, the principal amount is \$100,000. Interest is calculated on the principal (and often over unpaid interest that accumulates).

Students can take a quiz on these words at www.RudolphAcademy.com