Subtract 1/28 from 2/72
2/72 - 1/28 is -1/126.
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,
2/72 = 2 × 7/72 × 7 = 14/504 - Likewise, for the 2nd fraction, since 28 × 18 = 504,
1/28 = 1 × 18/28 × 18 = 18/504 - Subtract the two like fractions:
14/504 - 18/504 = 14 - 18/504 = -4/504 - After reducing the fraction, the answer is -1/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/72-1/28 2/72-2/28 2/72-1/56 6/72-1/28 2/72-3/28 2/72-1/84 10/72-1/28 2/72-5/28 14/72-1/28 2/72-7/28