Subtract 54/28 from 21/98
1st number: 21/98, 2nd number: 1 26/28
21/98 - 54/28 is -12/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 28 is 196
Next, find the equivalent fraction of both fractional numbers with denominator 196 - For the 1st fraction, since 98 × 2 = 196,
21/98 = 21 × 2/98 × 2 = 42/196 - Likewise, for the 2nd fraction, since 28 × 7 = 196,
54/28 = 54 × 7/28 × 7 = 378/196 - Subtract the two like fractions:
42/196 - 378/196 = 42 - 378/196 = -336/196 - After reducing the fraction, the answer is -12/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98-54/28 21/98-54/56 63/98-54/28 21/98-54/84