SOLUTION: This is a question on a handout the teacher gave us. I don't have a clue where to even begin. What number should be subtracted from the numerator of 21/29 to cause the fraction

SOLUTION: This is a question on a handout the teacher gave us. I don't have a clue where to even begin. What number should be subtracted from the numerator of 21/29 to cause the fraction

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Question 160639: This is a question on a handout the teacher gave us. I don't have a clue where to even begin.
What number should be subtracted from the numerator of 21/29 to cause the fraction to equal 3/5?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
(21-X)/29=3/5
5(21-X)=3*29
105-5X=87
-5X=87-105
-5X=-18
X=-18/-5
X=3.6 ANSWER.
PROOF:
(21-3.6)/29=3/5
17.4/29=3/5
17.4*5=29*3
87=87
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