Ratios and Proportions, i-ready 7th

unit rate

A rate in which the first quantity is compared to one unit of the second quantity.

rate

A ratio comparing two quantities with different kinds of units

proportion

An equation stating that two ratios are equal

proportional relationship

Proportions are the comparison of two equal ratios. Therefore, proportional relationships are relationships between two equal ratios. a relationship where the ratios between two kinds of values is always the same

ratio

The comparison when two (or more) numbers are compared by division.

constant rate of change

The rate of change between any two points in a linear relationship is the same or constant.

equivalent ratios

Two ratios that describe the same relationship

complex fraction

a fraction with fractions in the numerator or denominator

gratuity

a percent added on to the cost of a service

markup

a percent added to the cost of an item to determine the selling price

tax

a percent of a purchase that is added to the purchase and paid to the government

commission

a percent of a sales amount awarded to the person making the sale

simple interest

a percent of an amount borrowed that is paid to the lender in addition to the amount borrowed

ratio table

a table with columns filled with pairs of numbers that have the same ratio

percent

the number of parts per 100

percent decrease

the percent a quantity decreases from its original amount

percent increase

the percent a quantity increases from its original amount

percent change

the ratio that compares the amount of change to the original amount

percent error

the ratio that describes how far an estimate is from the actual amount

constant of proportionality

what the unit rate is called in a proportional relationship