Proportional Reasoning Part I

Question	Answer
Expresses the relationship between two or more quantities.	Ratio
A ratio of two quantities measured in different units.	Rate
A rate that has a denominator of 1 when expressed in fraction form.	Unit rate
Two ratios are called ... ratios when they have the same value.	Equivalent
Equation that states two ratios are equal	Proportion
To solve proportions, we can use	Inverse operations
Percent	An old latin word meaning per hundred
When a percent problem is being written as an equation, the key word "of" is used to indicate	Multiplication
A percent of change indicates	how much a quantity increases or decreases in comparison to the other amount
When a person invests or borrows an amount of money, the amount of money she earns or pays for borrowing the money is called	interest
The amount of money originally invested or borrowed is called	principal
Interest that is earned or paid only on the principal is called	simple interest
The simple interest earned or paid per year	annual interest rate
Formula for simple interest	I = Prt
The balance of an account earning simple annual interest is the sum of	The principal and the simple interest (B = P + Prt)
Interest that is earned on both the principal and any interest that has been earned previously	Compound interest B = P(1+r)^t

Resource summary

	Created by Heini Wilde about 9 years ago