Subtract 90/56 from 18/49
1st number: 18/49, 2nd number: 1 34/56
18/49 - 90/56 is -243/196.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 56 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 49 × 8 = 392,
18/49 = 18 × 8/49 × 8 = 144/392 - Likewise, for the 2nd fraction, since 56 × 7 = 392,
90/56 = 90 × 7/56 × 7 = 630/392 - Subtract the two like fractions:
144/392 - 630/392 = 144 - 630/392 = -486/392 - After reducing the fraction, the answer is -243/196
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/49-90/56 18/98-90/56 54/49-90/56 90/49-90/56