Add 15/10 and 27/42
1st number: 1 5/10, 2nd number: 27/42
15/10 + 27/42 is 15/7.
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,
15/10 = 15 × 21/10 × 21 = 315/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
27/42 = 27 × 5/42 × 5 = 135/210 - Add the two like fractions:
315/210 + 135/210 = 315 + 135/210 = 450/210 - 450/210 simplified gives 15/7
- So, 15/10 + 27/42 = 15/7
In mixed form: 21/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/10+27/42 15/10+54/42 15/20+27/42 15/10+27/84 45/10+27/42 15/10+81/42 15/30+27/42 75/10+27/42 15/50+27/42 15/70+27/42