Solutions by everydaycalculation.com

57 - 810 is -335.

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

LCM of 7 and 10 is**70**

Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,

57 = 5 × 107 × 10 = 5070 - Likewise, for the 2nd fraction, since 10 × 7 = 70,

810 = 8 × 710 × 7 = 5670 - Subtract the two like fractions:

5070 - 5670 = 50 - 5670 = -670 - After reducing the fraction, the answer is -335

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