Subtract 21/12 from 40/2
1st number: 20 0/2, 2nd number: 1 9/12
40/2 - 21/12 is 73/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 2 × 6 = 12,
40/2 = 40 × 6/2 × 6 = 240/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
21/12 = 21 × 1/12 × 1 = 21/12 - Subtract the two like fractions:
240/12 - 21/12 = 240 - 21/12 = 219/12 - After reducing the fraction, the answer is 73/4
- In mixed form: 181/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/2-21/12 40/2-42/12 40/4-21/12 40/2-21/24 40/2-63/12 40/6-21/12 40/2-21/36 40/10-21/12 40/2-21/60 40/14-21/12 40/2-21/84