Ratios

Ratios

1. Reducing ratios to their simplest form

   • Eg. 15:18
     • Common factor is 3, divide down by 3
       • 5:6

2. When the ratio contains a decimal

   • Eg. 2.4:3.6
     • Multiply both sides by 10 to get rid of the decimals
       • Then divide to reduce the ratio to it's simplest form
         • 2:3
       • 24:36

3. If the ratio has mixed units

   • Eg. Reduce the ratio 24mm : 7.2cm to it's simplest form
     • Convert 7.2cm to mm
       • 24mm : 72mm
         • Simplify resulting ratio
           • 1:3

4. Give the ratio 5/4 : 7/2 in its simplest form

   • Put fractions over a common denominator
     • 5/4 : 14/4
       • 5:14

5. To get the form 1:n or n:1 - just divide

   • Reduce 3:56 to the form 1:n
     • Divide both sides by 3
       • 1 : 56/3
         • 1 : 18 2/3