Add 18/15 and 36/42
1st number: 1 3/15, 2nd number: 36/42
18/15 + 36/42 is 72/35.
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,
18/15 = 18 × 14/15 × 14 = 252/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
36/42 = 36 × 5/42 × 5 = 180/210 - Add the two like fractions:
252/210 + 180/210 = 252 + 180/210 = 432/210 - 432/210 simplified gives 72/35
- So, 18/15 + 36/42 = 72/35
In mixed form: 22/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+36/42 18/15+72/42 18/30+36/42 18/15+36/84 54/15+36/42 18/45+36/42 90/15+36/42 18/75+36/42