Subtract 20/7 from 35/72
1st number: 35/72, 2nd number: 2 6/7
35/72 - 20/7 is -1195/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
35/72 = 35 × 7/72 × 7 = 245/504 - Likewise, for the 2nd fraction, since 7 × 72 = 504,
20/7 = 20 × 72/7 × 72 = 1440/504 - Subtract the two like fractions:
245/504 - 1440/504 = 245 - 1440/504 = -1195/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/72-20/7 35/72-40/7 35/72-20/14 35/72-60/7 35/72-20/21 35/72-20/35 35/72-20/49