Subtract 21/6 from 42/2
1st number: 21 0/2, 2nd number: 3 3/6
42/2 - 21/6 is 35/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 6 is 6
Next, find the equivalent fraction of both fractional numbers with denominator 6 - For the 1st fraction, since 2 × 3 = 6,
42/2 = 42 × 3/2 × 3 = 126/6 - Likewise, for the 2nd fraction, since 6 × 1 = 6,
21/6 = 21 × 1/6 × 1 = 21/6 - Subtract the two like fractions:
126/6 - 21/6 = 126 - 21/6 = 105/6 - After reducing the fraction, the answer is 35/2
- In mixed form: 171/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-21/6 42/2-42/6 42/4-21/6 42/2-21/12 42/2-63/6 42/6-21/6 42/2-21/18 42/10-21/6 42/2-21/30 42/14-21/6 42/2-21/42