Subtract 40/48 from 21/12
1st number: 1 9/12, 2nd number: 40/48
21/12 - 40/48 is 11/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 48 is 48
Next, find the equivalent fraction of both fractional numbers with denominator 48 - For the 1st fraction, since 12 × 4 = 48,
21/12 = 21 × 4/12 × 4 = 84/48 - Likewise, for the 2nd fraction, since 48 × 1 = 48,
40/48 = 40 × 1/48 × 1 = 40/48 - Subtract the two like fractions:
84/48 - 40/48 = 84 - 40/48 = 44/48 - After reducing the fraction, the answer is 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12-40/48 21/12-80/48 21/24-40/48 21/12-40/96 63/12-40/48 21/36-40/48 21/60-40/48 21/84-40/48