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posted by JR Saturday, February 2, 2013 at 11:10pm.

7 2/5 - 2 3/4 = I need to show how I got the answer

The LCD is 20. You will get 7 8/20 - 2 15/20. In the fraction, you can't subtract 15 from 8. Therefore you have to borrow 1 from 7. (20/20 = 1--so add 20 to 8, gives 28). 6 28/20 - 2 15/20 = 4 13/20

Thank you Barb

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