Ratios  Rates, Ratios, and Proportions
Ratios
What are twoterm and three term ratios? After watching this lesson, you will be able to answer this question by writing ratios in the lowest terms as well as in fraction and percent form. Practice your understanding by doing some reallife word questions too.
Basic Concepts
 Applications of percents
Lessons
Notes:
In this lesson, we will learn:
 Ratios With Decimals
 Ratios With Fractions
 Ratios in Different Units
 Application of Ratios
Notes:
 A ratio should always be in its simplest/most reduced 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.

Intro Lesson
Introduction to Ratios

1.
Write the following ratios using ratio notation in lowest terms.

2.
Write the following ratios in fraction form in lowest terms.

3.
The following table shows the sugar and flour needed for different kinds of bakery.
Bakery
Sugar (g)
Flour (g)
Cake
40
120
Cookie
20
60
bread
30
450

4.
Ratios With Decimals
Simplify the following ratios.

5.
Ratios With Fractions
Simplify the following ratios.

6.
Ratios in Different Units
Simplify the following ratios.