Subtract 48/72 from 21/98
21/98 - 48/72 is -19/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 72 is 3528
Next, find the equivalent fraction of both fractional numbers with denominator 3528 - For the 1st fraction, since 98 × 36 = 3528,
21/98 = 21 × 36/98 × 36 = 756/3528 - Likewise, for the 2nd fraction, since 72 × 49 = 3528,
48/72 = 48 × 49/72 × 49 = 2352/3528 - Subtract the two like fractions:
756/3528 - 2352/3528 = 756 - 2352/3528 = -1596/3528 - After reducing the fraction, the answer is -19/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98-48/72 21/98-96/72 63/98-48/72