Subtract 98/8 from 7/42, Solve 7/42

Subtract 98/8 from 7/42

1^st number: 7/42, 2^nd number: 12 2/8

7/42 - 98/8 is -145/12.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 42 × 4 = 168,
7/42 = 7 × 4/42 × 4 = 28/168
Likewise, for the 2nd fraction, since 8 × 21 = 168,
98/8 = 98 × 21/8 × 21 = 2058/168
Subtract the two like fractions:
28/168 - 2058/168 = 28 - 2058/168 = -2030/168
After reducing the fraction, the answer is -145/12

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