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On the planet Alaber, there are 15 dubbles to every 13 rews. If farmer Mimstoon has 100 rews on his frent farm, how many dubbles are on the farm?

1 Answer

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You have that on planet Alaber, there are 15 dubbles to every 13 rews. This proportion can be wrtten as 15:13, or 15/13.

In order to calculate how many dubbles are on the farm, while there are 100 rews. You use the previous ratio and proceed as follow:

15/13 = x/100 where x is the unknown number of dubbles

This is because the ratio between dubbles and rews must be the same.

You solve the previous equation as follow:

15/13=x/100 multiply both sides by 100 to cancel the denomitaro 100 right side

15/13(100) = x/100(100)

1500/13 = x

In order to write the previous result as a mixed number you divide numerator and denominator:

1500 | 13

143 115

70

65

5

Then, x = 1500/13 is also equal to:

x = 115 13/5

This means there are approximately 115 dubbles for 100 rews

User Kaizen
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