Ratio

A comparison of two numbers using division

You can write a ratio in 3 different forms: fraction, colon, the word "to"

You can use a ratio to compare information in three different settings: a part-to-part comparison, a part-to-whole comparison, or a whole-to-part comparison

Equivalent Ratios

• equivalent ratios work like fractions, whatever you do to the top (numerator), you have to do to the bottom (denominator

Rate

• A rate is a comparison of two measurements with different units of measure and is considered to be a special kind of ratio. For example, 12 golf balls for $6 can be written as 12:6. This RATE compares golf balls to their price.

Unit Rate

• A rate with a denominator of 1.

• When finding the unit rate, simplify the ratio.

• You could also divide.

• Basically think... "How much is just 1?"