Multiplying Fractions

How do you multiply fractions?

• Multiply the top numbers ONLY!!
• Multiply the bottom numbers ONLY!!
• Multiply ACROSS the TOP and ACROSS the BOTTOM! Then, Simplify!!
• You can't multiply a number less than one

2/5 x 1/3

• 3/15
• 2/15

What number would complete the equation for b?
7 x b = greater than 7

• 1/2
• 1       1/3

Do you have to find a common denominator when you multiply fractions?

• YES, just like adding and subtracting
• NO, silly when you multiply the denominators you get your new unit!

Find the area of a rectangle with a length of 3/4 and a width of 4/5. 
Area = L x W
SIMPLIFY to get your answer! 

• 3/5
• 3/4
• 3/6
• 3/7