Solutions by everydaycalculation.com

17 - 310 is -1170.

- 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,

17 = 1 × 107 × 10 = 1070 - Likewise, for the 2nd fraction, since 10 × 7 = 70,

310 = 3 × 710 × 7 = 2170 - Subtract the two like fractions:

1070 - 2170 = 10 - 2170 = -1170

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