Add 2/35 and 21/42
2/35 + 21/42 is 39/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 35 × 6 = 210,
2/35 = 2 × 6/35 × 6 = 12/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
21/42 = 21 × 5/42 × 5 = 105/210 - Add the two like fractions:
12/210 + 105/210 = 12 + 105/210 = 117/210 - 117/210 simplified gives 39/70
- So, 2/35 + 21/42 = 39/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/35+21/42 2/70+21/42 2/35+21/84 6/35+21/42 2/35+63/42 10/35+21/42 14/35+21/42