Subtract 42/49 from 42/63
42/63 - 42/49 is -4/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 49 is 441
Next, find the equivalent fraction of both fractional numbers with denominator 441 - For the 1st fraction, since 63 × 7 = 441,
42/63 = 42 × 7/63 × 7 = 294/441 - Likewise, for the 2nd fraction, since 49 × 9 = 441,
42/49 = 42 × 9/49 × 9 = 378/441 - Subtract the two like fractions:
294/441 - 378/441 = 294 - 378/441 = -84/441 - After reducing the fraction, the answer is -4/21
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