Subtract 4/49 from 42/21
1st number: 2 0/21, 2nd number: 4/49
42/21 - 4/49 is 94/49.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
42/21 = 42 × 7/21 × 7 = 294/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
4/49 = 4 × 3/49 × 3 = 12/147 - Subtract the two like fractions:
294/147 - 12/147 = 294 - 12/147 = 282/147 - After reducing the fraction, the answer is 94/49
- In mixed form: 145/49
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