Subtract 28/24 from 28/72
1st number: 28/72, 2nd number: 1 4/24
28/72 - 28/24 is -7/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 24 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
28/72 = 28 × 1/72 × 1 = 28/72 - Likewise, for the 2nd fraction, since 24 × 3 = 72,
28/24 = 28 × 3/24 × 3 = 84/72 - Subtract the two like fractions:
28/72 - 84/72 = 28 - 84/72 = -56/72 - After reducing the fraction, the answer is -7/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/72-28/24 28/72-56/24 28/72-28/48 84/72-28/24 28/72-84/24 28/72-28/72