Subtract 6/21 from 21/4
1st number: 5 1/4, 2nd number: 6/21
21/4 - 6/21 is 139/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
21/4 = 21 × 21/4 × 21 = 441/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
6/21 = 6 × 4/21 × 4 = 24/84 - Subtract the two like fractions:
441/84 - 24/84 = 441 - 24/84 = 417/84 - After reducing the fraction, the answer is 139/28
- In mixed form: 427/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4-6/21 21/4-12/21 21/8-6/21 21/4-6/42 63/4-6/21 21/4-18/21 21/12-6/21 21/4-6/63 21/4-30/21 21/20-6/21 21/4-42/21 21/28-6/21