4/5 - 8/15 = 12/15 - 8/15 = 4/15
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4/5 minus 1/3 = 7/15
it is 4 over 15
12/15 - 10/15 = 2/15
3/5-1/3... First make both fractions equal... 3/5 = 9/15 and 1/3 = 5/15. 9/15 - 5/15 = 4/15
Converting to twentieths, we get 8 over 20 minus 15 over 20, resulting in minus 7 over 20.