Add 21/15 and 36/70
1st number: 1 6/15, 2nd number: 36/70
21/15 + 36/70 is 67/35.
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,
36/70 = 36 × 3/70 × 3 = 108/210 - Add the two like fractions:
294/210 + 108/210 = 294 + 108/210 = 402/210 - 402/210 simplified gives 67/35
- So, 21/15 + 36/70 = 67/35
In mixed form: 132/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15+36/70 21/15+72/70 21/30+36/70 63/15+36/70 21/45+36/70 21/75+36/70