Subtract 21/7 from 42/98
1st number: 42/98, 2nd number: 3 0/7
42/98 - 21/7 is -18/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 7 is 98
Next, find the equivalent fraction of both fractional numbers with denominator 98 - For the 1st fraction, since 98 × 1 = 98,
42/98 = 42 × 1/98 × 1 = 42/98 - Likewise, for the 2nd fraction, since 7 × 14 = 98,
21/7 = 21 × 14/7 × 14 = 294/98 - Subtract the two like fractions:
42/98 - 294/98 = 42 - 294/98 = -252/98 - After reducing the fraction, the answer is -18/7
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