Subtract 3/42 from 25/72
25/72 - 3/42 is 139/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
25/72 = 25 × 7/72 × 7 = 175/504 - Likewise, for the 2nd fraction, since 42 × 12 = 504,
3/42 = 3 × 12/42 × 12 = 36/504 - Subtract the two like fractions:
175/504 - 36/504 = 175 - 36/504 = 139/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/72-3/42 25/72-6/42 25/72-3/84 75/72-3/42 25/72-9/42 25/72-15/42 25/72-21/42