Add 5/15 and 15/42
5/15 + 15/42 is 29/42.
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,
5/15 = 5 × 14/15 × 14 = 70/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Add the two like fractions:
70/210 + 75/210 = 70 + 75/210 = 145/210 - 145/210 simplified gives 29/42
- So, 5/15 + 15/42 = 29/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15+15/42 5/15+30/42 5/30+15/42 5/15+15/84 5/15+45/42 5/45+15/42 25/15+15/42 5/15+75/42 5/75+15/42 35/15+15/42