Subtract 75/18 from 42/49
1st number: 42/49, 2nd number: 4 3/18
42/49 - 75/18 is -139/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 18 is 882
Next, find the equivalent fraction of both fractional numbers with denominator 882 - For the 1st fraction, since 49 × 18 = 882,
42/49 = 42 × 18/49 × 18 = 756/882 - Likewise, for the 2nd fraction, since 18 × 49 = 882,
75/18 = 75 × 49/18 × 49 = 3675/882 - Subtract the two like fractions:
756/882 - 3675/882 = 756 - 3675/882 = -2919/882 - After reducing the fraction, the answer is -139/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/49-75/18 42/98-75/18 42/49-75/36 42/49-75/54 42/49-75/90