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set up a proportion...

part = %

whole 100

12 = x now solve algebraigally

150 100

1. cross multiply:

12*100 150*x

1200 = 150x

2. divide to get x alone (remember what you do to one side, you do to the other)

1200 = 150x

150 150

3. solve

8 = x

4. plug in your answer to see if it works (:

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15y ago

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