Subtract 9/27 from 40/28
1st number: 1 12/28, 2nd number: 9/27
40/28 - 9/27 is 23/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 27 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 28 × 27 = 756,
40/28 = 40 × 27/28 × 27 = 1080/756 - Likewise, for the 2nd fraction, since 27 × 28 = 756,
9/27 = 9 × 28/27 × 28 = 252/756 - Subtract the two like fractions:
1080/756 - 252/756 = 1080 - 252/756 = 828/756 - After reducing the fraction, the answer is 23/21
- In mixed form: 12/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/28-9/27 40/28-18/27 40/56-9/27 40/28-9/54 40/84-9/27 40/28-9/81 40/28-45/27 40/28-63/27