Add 42/10 and 15/20
1st number: 4 2/10, 2nd number: 15/20
42/10 + 15/20 is 99/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
42/10 = 42 × 2/10 × 2 = 84/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
15/20 = 15 × 1/20 × 1 = 15/20 - Add the two like fractions:
84/20 + 15/20 = 84 + 15/20 = 99/20 - So, 42/10 + 15/20 = 99/20
In mixed form: 419/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10+15/20 42/10+30/20 42/20+15/20 42/10+15/40 42/10+45/20 42/30+15/20 42/10+15/60 42/10+75/20 42/50+15/20 42/70+15/20