Subtract 7/84 from 21/14
1st number: 1 7/14, 2nd number: 7/84
21/14 - 7/84 is 17/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 14 × 6 = 84,
21/14 = 21 × 6/14 × 6 = 126/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
7/84 = 7 × 1/84 × 1 = 7/84 - Subtract the two like fractions:
126/84 - 7/84 = 126 - 7/84 = 119/84 - After reducing the fraction, the answer is 17/12
- In mixed form: 15/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14-7/84 21/14-14/84 21/28-7/84 63/14-7/84 21/14-21/84 21/42-7/84 21/14-35/84 21/70-7/84 21/14-49/84 21/98-7/84