Solutions by everydaycalculation.com

718 - 1021 is -11126.

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

LCM of 18 and 21 is**126**

Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,

718 = 7 × 718 × 7 = 49126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,

1021 = 10 × 621 × 6 = 60126 - Subtract the two like fractions:

49126 - 60126 = 49 - 60126 = -11126

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