Transcript How to Increase or Decrease a Recipe

(Multiplying and Dividing Fractions)
Adding Fraction Review

 Find common denominator
 Make sure you have the lowest common
denominator to make your job easier in the end!
 Add top numbers
Subtracting Fraction
Review

 Find Common Denominator
 Subtract first number from second number
Multiply Fractions

 Multiply the two top numbers
 The top numbers in a fraction are referred to as the
numerator
Multiply Fractions

 Multiply the bottom numbers
 The bottom numbers are referred to as the
denominators
Multiply Fractions

 Now you can multiply any numbers
 Samples will make multiplying easier
 Try
½x¾
 5/8 x 65/23
Dividing Fractions

 Turn the second fraction upside down
 Upside down fractions are called the reciprocal
Divide Fractions

 Multiply the first fraction by the reciprocal
 Multiplying fractions is needed to divide fractions!
Divide Fractions

 Simplify fraction
 Examples
 4/8=1/2
 200/100=2
Practice

 Again, practice makes perfect
 Try to divide these numbers
 3 / (2/3)
 (4/10 ) / (30/34)
 You are now a master divider
 Master of (Dividing)