Add 15/21 and 35/25
1st number: 15/21, 2nd number: 1 10/25
15/21 + 35/25 is 74/35.
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,
15/21 = 15 × 25/21 × 25 = 375/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
35/25 = 35 × 21/25 × 21 = 735/525 - Add the two like fractions:
375/525 + 735/525 = 375 + 735/525 = 1110/525 - 1110/525 simplified gives 74/35
- So, 15/21 + 35/25 = 74/35
In mixed form: 24/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+35/25 15/21+70/25 15/42+35/25 15/21+35/50 45/21+35/25 15/63+35/25 15/21+35/75 75/21+35/25