Solutions by everydaycalculation.com

57 - 58 is 556.

- Find the least common denominator or LCM of the two denominators:

LCM of 7 and 8 is**56**

Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,

57 = 5 × 87 × 8 = 4056 - Likewise, for the 2nd fraction, since 8 × 7 = 56,

58 = 5 × 78 × 7 = 3556 - Subtract the two like fractions:

4056 - 3556 = 40 - 3556 = 556

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