Add 35/21 and 20/30
1st number: 1 14/21, 2nd number: 20/30
35/21 + 20/30 is 7/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
35/21 = 35 × 10/21 × 10 = 350/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
20/30 = 20 × 7/30 × 7 = 140/210 - Add the two like fractions:
350/210 + 140/210 = 350 + 140/210 = 490/210 - 490/210 simplified gives 7/3
- So, 35/21 + 20/30 = 7/3
In mixed form: 21/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+20/30 35/21+40/30 35/42+20/30 35/21+20/60 35/21+60/30 35/63+20/30 35/21+20/90