Subtract 21/14 from 30/35
1st number: 30/35, 2nd number: 1 7/14
30/35 - 21/14 is -9/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 14 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 35 × 2 = 70,
30/35 = 30 × 2/35 × 2 = 60/70 - Likewise, for the 2nd fraction, since 14 × 5 = 70,
21/14 = 21 × 5/14 × 5 = 105/70 - Subtract the two like fractions:
60/70 - 105/70 = 60 - 105/70 = -45/70 - After reducing the fraction, the answer is -9/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/35-21/14 30/35-42/14 30/70-21/14 30/35-21/28 90/35-21/14 30/35-63/14 30/35-21/42 30/35-21/70 30/35-21/98