Subtract 16/49 from 42/21
1st number: 2 0/21, 2nd number: 16/49
42/21 - 16/49 is 82/49.
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,
16/49 = 16 × 3/49 × 3 = 48/147 - Subtract the two like fractions:
294/147 - 48/147 = 294 - 48/147 = 246/147 - After reducing the fraction, the answer is 82/49
- In mixed form: 133/49
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