Add 28/10 and 15/42
1st number: 2 8/10, 2nd number: 15/42
28/10 + 15/42 is 221/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
28/10 = 28 × 21/10 × 21 = 588/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Add the two like fractions:
588/210 + 75/210 = 588 + 75/210 = 663/210 - 663/210 simplified gives 221/70
- So, 28/10 + 15/42 = 221/70
In mixed form: 311/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/10+15/42 28/10+30/42 28/20+15/42 28/10+15/84 84/10+15/42 28/10+45/42 28/30+15/42 28/10+75/42 28/50+15/42 28/70+15/42