Subtract 7/9 from 42/49, Solve 42/49

Subtract 7/9 from 42/49

42/49 - 7/9 is 5/63.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 9 is 441

Next, find the equivalent fraction of both fractional numbers with denominator 441
For the 1st fraction, since 49 × 9 = 441,
42/49 = 42 × 9/49 × 9 = 378/441
Likewise, for the 2nd fraction, since 9 × 49 = 441,
7/9 = 7 × 49/9 × 49 = 343/441
Subtract the two like fractions:
378/441 - 343/441 = 378 - 343/441 = 35/441
After reducing the fraction, the answer is 5/63

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