Add 21/15 and 14/70
1st number: 1 6/15, 2nd number: 14/70
21/15 + 14/70 is 8/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
21/15 = 21 × 14/15 × 14 = 294/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
14/70 = 14 × 3/70 × 3 = 42/210 - Add the two like fractions:
294/210 + 42/210 = 294 + 42/210 = 336/210 - 336/210 simplified gives 8/5
- So, 21/15 + 14/70 = 8/5
In mixed form: 13/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15+14/70 21/15+28/70 21/30+14/70 63/15+14/70 21/15+42/70 21/45+14/70 21/75+14/70 21/15+98/70