Solutions by everydaycalculation.com

57 - 19 is 3863.

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

LCM of 7 and 9 is**63**

Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,

57 = 5 × 97 × 9 = 4563 - Likewise, for the 2nd fraction, since 9 × 7 = 63,

19 = 1 × 79 × 7 = 763 - Subtract the two like fractions:

4563 - 763 = 45 - 763 = 3863

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