To do this, first we convert to twenty-eights. That gives us eight twenty-eights minus seven twenty-eights which equals one twenty-eight.
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0.75
15/28 which is 15 over 28
3 - (2/7) = 2 5/7 or two and five sevenths.
The answer is 6/7 minus 2/5 = 16/35
Nine sevenths, or one and two sevenths.