What is ratio?

In this lesson, we will learn:

• Understanding Ratio Tables
• Part-to-part Ratio Vs. Part-to-whole 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:
  • Part-to-part (comparing one part to another)
  • Part-to-whole (comparing one part to the whole)