Subtract 35/14 from 21/42
1st number: 21/42, 2nd number: 2 7/14
21/42 - 35/14 is -2/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
21/42 = 21 × 1/42 × 1 = 21/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
35/14 = 35 × 3/14 × 3 = 105/42 - Subtract the two like fractions:
21/42 - 105/42 = 21 - 105/42 = -84/42 - After reducing the fraction, the answer is -2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42-70/14 21/84-35/14 21/42-35/28 63/42-35/14 21/42-35/42 21/42-35/70 21/42-35/98