Subtract 30/18 from 28/24
1st number: 1 4/24, 2nd number: 1 12/18
28/24 - 30/18 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 24 × 3 = 72,
28/24 = 28 × 3/24 × 3 = 84/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
30/18 = 30 × 4/18 × 4 = 120/72 - Subtract the two like fractions:
84/72 - 120/72 = 84 - 120/72 = -36/72 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/24-30/18 28/24-60/18 28/48-30/18 28/24-30/36 84/24-30/18 28/24-90/18 28/72-30/18 28/24-30/54 28/24-30/90