Add 21/14 and 9/10
1st number: 1 7/14, 2nd number: 9/10
21/14 + 9/10 is 12/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 14 × 5 = 70,
21/14 = 21 × 5/14 × 5 = 105/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
9/10 = 9 × 7/10 × 7 = 63/70 - Add the two like fractions:
105/70 + 63/70 = 105 + 63/70 = 168/70 - 168/70 simplified gives 12/5
- So, 21/14 + 9/10 = 12/5
In mixed form: 22/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+9/10 21/14+18/10 21/28+9/10 21/14+9/20 63/14+9/10 21/14+27/10 21/42+9/10 21/14+9/30 21/14+45/10 21/70+9/10 21/14+9/50 21/14+63/10 21/98+9/10 21/14+9/70