Add 4/10 and 3/21
4/10 + 3/21 is 19/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
4/10 = 4 × 21/10 × 21 = 84/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
3/21 = 3 × 10/21 × 10 = 30/210 - Add the two like fractions:
84/210 + 30/210 = 84 + 30/210 = 114/210 - 114/210 simplified gives 19/35
- So, 4/10 + 3/21 = 19/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/10+3/21 4/10+6/21 4/20+3/21 4/10+3/42 12/10+3/21 4/10+9/21 4/30+3/21 4/10+3/63 20/10+3/21 4/10+15/21 4/50+3/21 28/10+3/21 4/70+3/21