Add 25/4 and 30/21
1st number: 6 1/4, 2nd number: 1 9/21
25/4 + 30/21 is 215/28.
Steps for adding 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,
25/4 = 25 × 21/4 × 21 = 525/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
30/21 = 30 × 4/21 × 4 = 120/84 - Add the two like fractions:
525/84 + 120/84 = 525 + 120/84 = 645/84 - 645/84 simplified gives 215/28
- So, 25/4 + 30/21 = 215/28
In mixed form: 719/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/4+30/21 25/4+60/21 25/8+30/21 25/4+30/42 75/4+30/21 25/4+90/21 25/12+30/21 25/4+30/63 25/20+30/21 25/28+30/21