Subtract 21/72 from 30/98
30/98 - 21/72 is 17/1176.
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,
30/98 = 30 × 36/98 × 36 = 1080/3528 - Likewise, for the 2nd fraction, since 72 × 49 = 3528,
21/72 = 21 × 49/72 × 49 = 1029/3528 - Subtract the two like fractions:
1080/3528 - 1029/3528 = 1080 - 1029/3528 = 51/3528 - After reducing the fraction, the answer is 17/1176
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/98-21/72 30/98-42/72 90/98-21/72 30/98-63/72