Add 28/21 and 24/25
1st number: 1 7/21, 2nd number: 24/25
28/21 + 24/25 is 172/75.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
28/21 = 28 × 25/21 × 25 = 700/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
24/25 = 24 × 21/25 × 21 = 504/525 - Add the two like fractions:
700/525 + 504/525 = 700 + 504/525 = 1204/525 - 1204/525 simplified gives 172/75
- So, 28/21 + 24/25 = 172/75
In mixed form: 222/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+24/25 28/21+48/25 28/42+24/25 28/21+24/50 84/21+24/25 28/21+72/25 28/63+24/25 28/21+24/75