Add 3/42 and 63/70
3/42 + 63/70 is 34/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
3/42 = 3 × 5/42 × 5 = 15/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
63/70 = 63 × 3/70 × 3 = 189/210 - Add the two like fractions:
15/210 + 189/210 = 15 + 189/210 = 204/210 - 204/210 simplified gives 34/35
- So, 3/42 + 63/70 = 34/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42+63/70 3/84+63/70 9/42+63/70 15/42+63/70 21/42+63/70