Subtract 40/28 from 35/72
1st number: 35/72, 2nd number: 1 12/28
35/72 - 40/28 is -475/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 28 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 28 × 18 = 504,
40/28 = 40 × 18/28 × 18 = 720/504 - Subtract the two like fractions:
245/504 - 720/504 = 245 - 720/504 = -475/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/72-40/28 35/72-80/28 35/72-40/56 35/72-40/84