What is ratio?  Rates, Ratios, and Proportions
What is ratio?
Lessons
Notes:
In this lesson, we will learn:
 Understanding Ratio Tables
 Parttopart Ratio Vs. Parttowhole Ratio
 Evaluate Ratios Involving Unit Conversion
 Determine the Scale of a Map (Ratio)
 Analyze Ratios of 3 Objects
Notes:
 A ratio shows the relative values of two or more objects
 A punctuation mark colon (:) or the word "to" is used to separate the values.
 A ratio can be expressed as a fraction, which can be further converted to a decimal or a percentage.
 A ratio should always be in its simplest form (no common factors).
 The values in a ratio should always be integers if possible.
 A ratio can be scaled up/down by multiplying/dividing the ratio numbers by the same value. This process is called scaling, and the value used for scaling is called the scale factor.
 There are two types of ratio:
 Parttopart (comparing one part to another)
 Parttowhole (comparing one part to the whole)
 Parttopart (comparing one part to another)
 Parttowhole (comparing one part to the whole)

2.
Parttopart Ratio Vs. Parttowhole Ratio
There are 14 boys and 16 girls in a particular class.