Subtract 14/28 from 28/21
1st number: 1 7/21, 2nd number: 14/28
28/21 - 14/28 is 5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
28/21 = 28 × 4/21 × 4 = 112/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
14/28 = 14 × 3/28 × 3 = 42/84 - Subtract the two like fractions:
112/84 - 42/84 = 112 - 42/84 = 70/84 - After reducing the fraction, the answer is 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21-14/28 28/42-14/28 28/21-14/56 84/21-14/28 28/21-42/28 28/63-14/28 28/21-14/84 28/21-70/28 28/21-98/28