Subtract 42/49 from 1/27
1/27 - 42/49 is -155/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 49 is 1323
Next, find the equivalent fraction of both fractional numbers with denominator 1323 - For the 1st fraction, since 27 × 49 = 1323,
1/27 = 1 × 49/27 × 49 = 49/1323 - Likewise, for the 2nd fraction, since 49 × 27 = 1323,
42/49 = 42 × 27/49 × 27 = 1134/1323 - Subtract the two like fractions:
49/1323 - 1134/1323 = 49 - 1134/1323 = -1085/1323 - After reducing the fraction, the answer is -155/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/27-42/49 1/27-84/49 1/54-42/49 1/27-42/98 3/27-42/49 1/81-42/49 5/27-42/49 7/27-42/49