EdReady: Ratios, Rates, Proportions, and Percents

ratio

compares two quantities

rate

compares two quantities with different units

proportion

compares two ratios/rates

cross multiplication

helps if missing proportions

if the products in cross multiplication are equal

the proportion is true

percents

parts of a whole (out of 100)

base

whole amount

amount

portion of a whole

finding amount

percent x base = amount

finding the base

base = amount/percent

finding percent

percent = amount/base

What percent of base is amount?

percent = amount/base

additional percentage

100% + x%