Subtract 21/4 from 42/3
1st number: 14 0/3, 2nd number: 5 1/4
42/3 - 21/4 is 35/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 4 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 3 × 4 = 12,
42/3 = 42 × 4/3 × 4 = 168/12 - Likewise, for the 2nd fraction, since 4 × 3 = 12,
21/4 = 21 × 3/4 × 3 = 63/12 - Subtract the two like fractions:
168/12 - 63/12 = 168 - 63/12 = 105/12 - After reducing the fraction, the answer is 35/4
- In mixed form: 83/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/3-21/4 42/3-42/4 42/6-21/4 42/3-21/8 42/3-63/4 42/9-21/4 42/3-21/12 42/15-21/4 42/3-21/20 42/21-21/4 42/3-21/28