Subtract 35/72 from 28/42
28/42 - 35/72 is 13/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
28/42 = 28 × 12/42 × 12 = 336/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
35/72 = 35 × 7/72 × 7 = 245/504 - Subtract the two like fractions:
336/504 - 245/504 = 336 - 245/504 = 91/504 - After reducing the fraction, the answer is 13/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42-35/72 28/42-70/72 28/84-35/72 84/42-35/72