Add 10/15 and 80/42
1st number: 10/15, 2nd number: 1 38/42
10/15 + 80/42 is 18/7.
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,
80/42 = 80 × 5/42 × 5 = 400/210 - Add the two like fractions:
140/210 + 400/210 = 140 + 400/210 = 540/210 - 540/210 simplified gives 18/7
- So, 10/15 + 80/42 = 18/7
In mixed form: 24/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15+80/42 10/30+80/42 10/15+80/84 30/15+80/42 10/45+80/42 50/15+80/42 10/75+80/42 70/15+80/42