Solutions by everydaycalculation.com

1^{st} number: 7/18, 2^{nd} number: 1 14/21

718 - 3521 is -2318.

- 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,

3521 = 35 × 621 × 6 = 210126 - Subtract the two like fractions:

49126 - 210126 = 49 - 210126 = -161126 - After reducing the fraction, the answer is -2318

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