Question

How do i solve a question like:. After earning interest, the balance of an account is $420. The new balance is 7 over 6 of the original balance. How much interest was earned Show your working.. . P.S I will give a medal for best answer :)

Answer 1

Let x = account's original amount. 

7x/6 = 420 
x/6 = 60 
x = 360 

interest earned = (7/6 - 1)x = 1/6(360) = $60

Therefore, the interest that she will earn is $60.


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