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katydid11
3 1/4 - 2 5/6 type into your calculator

fullmetall
Well Mike mowed 3/4 of a lawn while Allen mowed 1 whole & 4/6 of a lawn.
So we find the least common denominator which is 12.
3/4 is now 9/12 and 1 & 4/6 is now 1 & 8/12 (20/12).
Allen mowed 11/12 more lawns than Mike.