Subtract 48/49 from 21/28
21/28 - 48/49 is -45/196.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 49 is 196
Next, find the equivalent fraction of both fractional numbers with denominator 196 - For the 1st fraction, since 28 × 7 = 196,
21/28 = 21 × 7/28 × 7 = 147/196 - Likewise, for the 2nd fraction, since 49 × 4 = 196,
48/49 = 48 × 4/49 × 4 = 192/196 - Subtract the two like fractions:
147/196 - 192/196 = 147 - 192/196 = -45/196
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28-48/49 21/28-96/49 21/56-48/49 21/28-48/98 63/28-48/49 21/84-48/49