Add 20/15 and 12/70
1st number: 1 5/15, 2nd number: 12/70
20/15 + 12/70 is 158/105.
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,
20/15 = 20 × 14/15 × 14 = 280/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
12/70 = 12 × 3/70 × 3 = 36/210 - Add the two like fractions:
280/210 + 36/210 = 280 + 36/210 = 316/210 - 316/210 simplified gives 158/105
- So, 20/15 + 12/70 = 158/105
In mixed form: 153/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+12/70 20/15+24/70 20/30+12/70 60/15+12/70 20/15+36/70 20/45+12/70 20/15+60/70 20/75+12/70 20/15+84/70