Subtract 98/72 from 7/42, Solve 7/42

Subtract 98/72 from 7/42

1^st number: 7/42, 2^nd number: 1 26/72

7/42 - 98/72 is -43/36.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 42 × 12 = 504,
7/42 = 7 × 12/42 × 12 = 84/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
98/72 = 98 × 7/72 × 7 = 686/504
Subtract the two like fractions:
84/504 - 686/504 = 84 - 686/504 = -602/504
After reducing the fraction, the answer is -43/36

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