Subtract 7/8 from 18/49
18/49 - 7/8 is -199/392.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 8 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 8 × 49 = 392,
7/8 = 7 × 49/8 × 49 = 343/392 - Subtract the two like fractions:
144/392 - 343/392 = 144 - 343/392 = -199/392
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/49-7/8 18/49-14/8 18/98-7/8 18/49-7/16 54/49-7/8 18/49-21/8 18/49-7/24 90/49-7/8 18/49-35/8 18/49-7/40 18/49-49/8 18/49-7/56