Add 35/15 and 20/42
1st number: 2 5/15, 2nd number: 20/42
35/15 + 20/42 is 59/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
35/15 = 35 × 14/15 × 14 = 490/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Add the two like fractions:
490/210 + 100/210 = 490 + 100/210 = 590/210 - 590/210 simplified gives 59/21
- So, 35/15 + 20/42 = 59/21
In mixed form: 217/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/15+20/42 35/15+40/42 35/30+20/42 35/15+20/84 35/15+60/42 35/45+20/42 35/75+20/42