Add 70/15 and 15/20
1st number: 4 10/15, 2nd number: 15/20
70/15 + 15/20 is 65/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
70/15 = 70 × 4/15 × 4 = 280/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
15/20 = 15 × 3/20 × 3 = 45/60 - Add the two like fractions:
280/60 + 45/60 = 280 + 45/60 = 325/60 - 325/60 simplified gives 65/12
- So, 70/15 + 15/20 = 65/12
In mixed form: 55/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/15+30/20 70/30+15/20 70/15+15/40 70/15+45/20 70/45+15/20 70/15+15/60 70/15+75/20 70/75+15/20