Add 28/42 and 24/15
1st number: 28/42, 2nd number: 1 9/15
28/42 + 24/15 is 34/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
28/42 = 28 × 5/42 × 5 = 140/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
24/15 = 24 × 14/15 × 14 = 336/210 - Add the two like fractions:
140/210 + 336/210 = 140 + 336/210 = 476/210 - 476/210 simplified gives 34/15
- So, 28/42 + 24/15 = 34/15
In mixed form: 24/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42+24/15 28/42+48/15 28/84+24/15 28/42+24/30 84/42+24/15 28/42+72/15 28/42+24/45 28/42+24/75