Add 21/3 and 15/70
1st number: 7 0/3, 2nd number: 15/70
21/3 + 15/70 is 101/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 3 × 70 = 210,
21/3 = 21 × 70/3 × 70 = 1470/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
15/70 = 15 × 3/70 × 3 = 45/210 - Add the two like fractions:
1470/210 + 45/210 = 1470 + 45/210 = 1515/210 - 1515/210 simplified gives 101/14
- So, 21/3 + 15/70 = 101/14
In mixed form: 73/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3+15/70 21/3+30/70 21/6+15/70 63/3+15/70 21/3+45/70 21/9+15/70 21/3+75/70 21/15+15/70