Solutions by everydaycalculation.com

1^{st} number: 7/18, 2^{nd} number: 2 8/21

718 - 5021 is -251126.

- 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,

5021 = 50 × 621 × 6 = 300126 - Subtract the two like fractions:

49126 - 300126 = 49 - 300126 = -251126

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