Solutions by everydaycalculation.com

17 - 28 is -328.

- 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,

17 = 1 × 87 × 8 = 856 - Likewise, for the 2nd fraction, since 8 × 7 = 56,

28 = 2 × 78 × 7 = 1456 - Subtract the two like fractions:

856 - 1456 = 8 - 1456 = -656 - After reducing the fraction, the answer is -328

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