Solutions by everydaycalculation.com

19 - 710 is -5390.

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

LCM of 9 and 10 is**90**

Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,

19 = 1 × 109 × 10 = 1090 - Likewise, for the 2nd fraction, since 10 × 9 = 90,

710 = 7 × 910 × 9 = 6390 - Subtract the two like fractions:

1090 - 6390 = 10 - 6390 = -5390

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