Add 20/15 and 24/42
1st number: 1 5/15, 2nd number: 24/42
20/15 + 24/42 is 40/21.
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,
24/42 = 24 × 5/42 × 5 = 120/210 - Add the two like fractions:
280/210 + 120/210 = 280 + 120/210 = 400/210 - 400/210 simplified gives 40/21
- So, 20/15 + 24/42 = 40/21
In mixed form: 119/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+24/42 20/15+48/42 20/30+24/42 20/15+24/84 60/15+24/42 20/15+72/42 20/45+24/42 20/75+24/42