Subtract 3/72 from 21/98
21/98 - 3/72 is 29/168.
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,
3/72 = 3 × 49/72 × 49 = 147/3528 - Subtract the two like fractions:
756/3528 - 147/3528 = 756 - 147/3528 = 609/3528 - After reducing the fraction, the answer is 29/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98-3/72 21/98-6/72 63/98-3/72 21/98-9/72 21/98-15/72 21/98-21/72