Add 3/21 and 25/4
1st number: 3/21, 2nd number: 6 1/4
3/21 + 25/4 is 179/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
3/21 = 3 × 4/21 × 4 = 12/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
25/4 = 25 × 21/4 × 21 = 525/84 - Add the two like fractions:
12/84 + 525/84 = 12 + 525/84 = 537/84 - 537/84 simplified gives 179/28
- So, 3/21 + 25/4 = 179/28
In mixed form: 611/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+25/4 3/21+50/4 3/42+25/4 3/21+25/8 9/21+25/4 3/21+75/4 3/63+25/4 3/21+25/12 15/21+25/4 3/21+25/20 3/21+25/28