Subtract 4/72 from 35/21
1st number: 1 14/21, 2nd number: 4/72
35/21 - 4/72 is 29/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
35/21 = 35 × 24/21 × 24 = 840/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
4/72 = 4 × 7/72 × 7 = 28/504 - Subtract the two like fractions:
840/504 - 28/504 = 840 - 28/504 = 812/504 - After reducing the fraction, the answer is 29/18
- In mixed form: 111/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21-4/72 35/21-8/72 35/42-4/72 35/21-12/72 35/63-4/72 35/21-20/72 35/21-28/72