Subtract 3/27 from 42/49, Solve 42/49

Subtract 3/27 from 42/49

42/49 - 3/27 is 47/63.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 27 is 1323

Next, find the equivalent fraction of both fractional numbers with denominator 1323
For the 1st fraction, since 49 × 27 = 1323,
42/49 = 42 × 27/49 × 27 = 1134/1323
Likewise, for the 2nd fraction, since 27 × 49 = 1323,
3/27 = 3 × 49/27 × 49 = 147/1323
Subtract the two like fractions:
1134/1323 - 147/1323 = 1134 - 147/1323 = 987/1323
After reducing the fraction, the answer is 47/63

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