Subtract 21/7 from 14/84
1st number: 14/84, 2nd number: 3 0/7
14/84 - 21/7 is -17/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
14/84 = 14 × 1/84 × 1 = 14/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
21/7 = 21 × 12/7 × 12 = 252/84 - Subtract the two like fractions:
14/84 - 252/84 = 14 - 252/84 = -238/84 - After reducing the fraction, the answer is -17/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/84-21/7 14/84-42/7 14/84-21/14 42/84-21/7 14/84-63/7 70/84-21/7 14/84-21/35 98/84-21/7 14/84-21/49