Subtract 30/6 from 21/14
1st number: 1 7/14, 2nd number: 5 0/6
21/14 - 30/6 is -7/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
21/14 = 21 × 3/14 × 3 = 63/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
30/6 = 30 × 7/6 × 7 = 210/42 - Subtract the two like fractions:
63/42 - 210/42 = 63 - 210/42 = -147/42 - After reducing the fraction, the answer is -7/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14-30/6 21/14-60/6 21/28-30/6 21/14-30/12 63/14-30/6 21/14-90/6 21/42-30/6 21/14-30/18 21/70-30/6 21/98-30/6 21/14-30/42