= 9      

 c)    : 1                                  Multiply by 2 to remove fraction.

   =   2 : 12

      = 7 : 2

d) 45minutes to 1.5hours     Convert 1.5hours to minutes.

    45mins : 90mins                     

Cancel out unitsand divide both sides by 45.         

     =  :

        =       

Unit 9 Lesson 1: Exercise 1

  Simplify the following.

1. 16:36                                  6) 12 :20 :24
2. 50: 250                               7)  9 :15: 18
3. 22: 132                                8) 76: 40 :100
4. 150:45:5                              9) 75 :25: 35
5. 16:24:8                                 10) 250: 125: 50

Unit 9 Lesson 1: Exercise 2

Write each of the following ratios of quantities in its simplest form.

(Remember to always express both parts in a common unit)

1. 75cents:$2                                     6) 1day:360minutes
2.  12cm to2.6m                                7) 3kg:250g
3.  1hour :65minutes                         8) 20mm:1m
4.  400m:4km                                         9) 600minute:2days

5)24hours to 2days                           10) 45minutes:5munites

Unit 9 Lesson 1: Exercise 3

 Simplify the following.

1.     $7.50 to $ 5                        6) ¾ : 4        

•  70m t0 0.5km                         7 

•  28¢ to$2                                 8)    
• 15days to 1 year                    9) 270g t0 1/2kg

•  ¾kg to 200g                           10