Add 2/10 and 15/21
2/10 + 15/21 is 32/35.
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,
2/10 = 2 × 21/10 × 21 = 42/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
15/21 = 15 × 10/21 × 10 = 150/210 - Add the two like fractions:
42/210 + 150/210 = 42 + 150/210 = 192/210 - 192/210 simplified gives 32/35
- So, 2/10 + 15/21 = 32/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/10+15/21 2/10+30/21 2/20+15/21 2/10+15/42 6/10+15/21 2/10+45/21 2/30+15/21 2/10+15/63 2/10+75/21 2/50+15/21 14/10+15/21 2/70+15/21