1. Warm Up Problem
There are 300 students in a middle school. If 17% of the students brought veggies as a snack, how many students brought veggies as a snack?

2. Multiply Fractions
Lesson 4-3

3. Objectives I can multiply a fraction by a fraction.
I can simplify BEFORE I multiply.

4. Multiplying Fractions
Step 1: Multiply the numerators Step 2: Multiply the denominators Step 3: Simplify

5. Example 1 Find 1 3 x 1 4 . Write in simplest form.
Multiply the numerators and denominators:
1 3 x = 1 12
Model:

6. Got It? Find 1 2 x 3 5 Find 1 3 x 3 4 Find 2 3 x 5 6
Finished? Try drawing a model.

7. Example 2
Find 3 4 x Simplify. Can we simplify, before we multiply? 3 & 6 have the common factor of 3. So divide both by x 5 2 = 5 8 Double check: 3 4 x 5 6 = ÷ 3 3 = 5 8

8. Example 3 Find 4 9 x 18. 4 9 x 18 1 Can we simply before we multiply?
4 1 x = or 8

9. Got It?
4) 3 4 x 4 9 5) 5 6 x ) 3 5 x 10

10. Example 4
Frank had 1 2 of the lawn left to mow. On Saturday, he mowed 2 3 of what was left. What fraction of the entire lawn did Frank more on Saturday? 1 2 x 2 3 Divide the numerator and denominator by x 1 3 = 1 3 So, Frank mowed 1 3 of the lawn on Saturday.

11. Got It?
7) Rick has of a foot-long sub left from yesterday. He ate of the leftover as a snack. What fraction of the entire sandwich did he eat as a snack?

12. Homework Hint #12
Write an example of each scenario to see if it is true or false. Example: The product of two fractions are always greater than ½. 1 3 𝑥 2 5 = 2 15 This is false.