Add 20/15 and 9/42
1st number: 1 5/15, 2nd number: 9/42
20/15 + 9/42 is 65/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 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 42 × 5 = 210,
9/42 = 9 × 5/42 × 5 = 45/210 - Add the two like fractions:
280/210 + 45/210 = 280 + 45/210 = 325/210 - 325/210 simplified gives 65/42
- So, 20/15 + 9/42 = 65/42
In mixed form: 123/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+9/42 20/15+18/42 20/30+9/42 20/15+9/84 60/15+9/42 20/15+27/42 20/45+9/42 20/15+45/42 20/75+9/42 20/15+63/42