Add 10/15 and 3/42
10/15 + 3/42 is 31/42.
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,
10/15 = 10 × 14/15 × 14 = 140/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
3/42 = 3 × 5/42 × 5 = 15/210 - Add the two like fractions:
140/210 + 15/210 = 140 + 15/210 = 155/210 - 155/210 simplified gives 31/42
- So, 10/15 + 3/42 = 31/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15+3/42 10/15+6/42 10/30+3/42 10/15+3/84 30/15+3/42 10/15+9/42 10/45+3/42 50/15+3/42 10/15+15/42 10/75+3/42 70/15+3/42 10/15+21/42