Subtract 42/9 from 28/24
1st number: 1 4/24, 2nd number: 4 6/9
28/24 - 42/9 is -7/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 9 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 9 × 8 = 72,
42/9 = 42 × 8/9 × 8 = 336/72 - Subtract the two like fractions:
84/72 - 336/72 = 84 - 336/72 = -252/72 - After reducing the fraction, the answer is -7/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/24-42/9 28/24-84/9 28/48-42/9 28/24-42/18 84/24-42/9 28/72-42/9 28/24-42/27 28/24-42/45 28/24-42/63