Subtract 10/72 from 1/28
1/28 - 10/72 is -13/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 28 × 18 = 504,
1/28 = 1 × 18/28 × 18 = 18/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
10/72 = 10 × 7/72 × 7 = 70/504 - Subtract the two like fractions:
18/504 - 70/504 = 18 - 70/504 = -52/504 - After reducing the fraction, the answer is -13/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/28-10/72 1/28-20/72 1/56-10/72 3/28-10/72 1/28-30/72 1/84-10/72 5/28-10/72 1/28-50/72 7/28-10/72 1/28-70/72