Add 15/42 and 3/10
15/42 + 3/10 is 23/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
3/10 = 3 × 21/10 × 21 = 63/210 - Add the two like fractions:
75/210 + 63/210 = 75 + 63/210 = 138/210 - 138/210 simplified gives 23/35
- So, 15/42 + 3/10 = 23/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42+3/10 15/42+6/10 15/84+3/10 15/42+3/20 45/42+3/10 15/42+9/10 15/42+3/30 75/42+3/10 15/42+15/10 15/42+3/50 15/42+21/10 15/42+3/70