Add 1/10 and 15/21
1/10 + 15/21 is 57/70.
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,
1/10 = 1 × 21/10 × 21 = 21/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
15/21 = 15 × 10/21 × 10 = 150/210 - Add the two like fractions:
21/210 + 150/210 = 21 + 150/210 = 171/210 - 171/210 simplified gives 57/70
- So, 1/10 + 15/21 = 57/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/10+15/21 1/10+30/21 1/20+15/21 1/10+15/42 3/10+15/21 1/10+45/21 1/30+15/21 1/10+15/63 5/10+15/21 1/10+75/21 1/50+15/21 7/10+15/21 1/70+15/21