Subtract 21/24 from 40/28
1st number: 1 12/28, 2nd number: 21/24
40/28 - 21/24 is 31/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 28 × 6 = 168,
40/28 = 40 × 6/28 × 6 = 240/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
21/24 = 21 × 7/24 × 7 = 147/168 - Subtract the two like fractions:
240/168 - 147/168 = 240 - 147/168 = 93/168 - After reducing the fraction, the answer is 31/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/28-21/24 40/28-42/24 40/56-21/24 40/28-21/48 40/28-63/24 40/84-21/24 40/28-21/72