Subtract 84/72 from 1/28
1st number: 1/28, 2nd number: 1 12/72
1/28 - 84/72 is -95/84.
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,
84/72 = 84 × 7/72 × 7 = 588/504 - Subtract the two like fractions:
18/504 - 588/504 = 18 - 588/504 = -570/504 - After reducing the fraction, the answer is -95/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/28-84/72 1/56-84/72 3/28-84/72 1/84-84/72 5/28-84/72 7/28-84/72