Add 4/21 and 3/70
4/21 + 3/70 is 7/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
4/21 = 4 × 10/21 × 10 = 40/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
3/70 = 3 × 3/70 × 3 = 9/210 - Add the two like fractions:
40/210 + 9/210 = 40 + 9/210 = 49/210 - 49/210 simplified gives 7/30
- So, 4/21 + 3/70 = 7/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+3/70 4/21+6/70 4/42+3/70 12/21+3/70 4/21+9/70 4/63+3/70 20/21+3/70 4/21+15/70 28/21+3/70 4/21+21/70