Subtract 75/24 from 28/21
1st number: 1 7/21, 2nd number: 3 3/24
28/21 - 75/24 is -43/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
28/21 = 28 × 8/21 × 8 = 224/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
75/24 = 75 × 7/24 × 7 = 525/168 - Subtract the two like fractions:
224/168 - 525/168 = 224 - 525/168 = -301/168 - After reducing the fraction, the answer is -43/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21-75/24 28/42-75/24 28/21-75/48 84/21-75/24 28/63-75/24 28/21-75/72