Unit 8

Question 0

Percent equations

Answer 0

Part = Percent x Whole
An equation that is used to find either the part, percent, or whole
PERCENTS MUST BE IN DECIMAL FORM!
EX.
50 = .25(200)
25 = a(100)

Question 1

Percent

Answer 1

A part of a whole, usually based on 100
EX.
56%, 0.35%, 210%

Question 2

Percent Proportion

Answer 2

A proportion using the part, whole, percent, and 100 (percents are out of 100)

Question 3

Percent of Change

Answer 3

The percent that a number or value changes over time
(new-old/old)
EX.
from 75 to 100 = 34% change

Question 4

Equation for Percent of Change

Answer 4

new-old/old
EX.
100-75/75

Question 5

If the percent of change increases, then the percent change is ____.

Answer 5

positive
EX.
35% change = positive

Question 6

If the percent of change decreases, then the percent change is ____.

Answer 6

negative
EX.
-65% = negative

Question 7

Interest

Answer 7

The amount of money paid or earned for the use of money

Question 8

Simple Interest

Answer 8

the amount paid only on initial principal

I = p x r x t

Question 9

Principal

Answer 9

the amount of money used or borrowed

Question 10

Rate

Answer 10

the interest rate (often as a decimal)

Question 11

Time

Answer 11

the amount of time used to pay the interest

Question 12

Compound Interest

Answer 12

interest that is paid on initial principle and on previous interest
I = p(1+ r/n)^nt