Subtract 25/21 from 28/4
1st number: 7 0/4, 2nd number: 1 4/21
28/4 - 25/21 is 122/21.
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,
28/4 = 28 × 21/4 × 21 = 588/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
25/21 = 25 × 4/21 × 4 = 100/84 - Subtract the two like fractions:
588/84 - 100/84 = 588 - 100/84 = 488/84 - After reducing the fraction, the answer is 122/21
- In mixed form: 517/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/4-25/21 28/4-50/21 28/8-25/21 28/4-25/42 84/4-25/21 28/4-75/21 28/12-25/21 28/4-25/63 28/20-25/21