Add 35/75 and 15/21
35/75 + 15/21 is 124/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
35/75 = 35 × 7/75 × 7 = 245/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
15/21 = 15 × 25/21 × 25 = 375/525 - Add the two like fractions:
245/525 + 375/525 = 245 + 375/525 = 620/525 - 620/525 simplified gives 124/105
- So, 35/75 + 15/21 = 124/105
In mixed form: 119/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/75+15/21 35/75+30/21 35/75+15/42 35/75+45/21 35/75+15/63 35/75+75/21