Add 15/42 and 25/10
1st number: 15/42, 2nd number: 2 5/10
15/42 + 25/10 is 20/7.
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,
25/10 = 25 × 21/10 × 21 = 525/210 - Add the two like fractions:
75/210 + 525/210 = 75 + 525/210 = 600/210 - 600/210 simplified gives 20/7
- So, 15/42 + 25/10 = 20/7
In mixed form: 26/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42+25/10 15/42+50/10 15/84+25/10 15/42+25/20 45/42+25/10 15/42+75/10 15/42+25/30 75/42+25/10 15/42+25/50 15/42+25/70