Add 15/35 and 42/20
1st number: 15/35, 2nd number: 2 2/20
15/35 + 42/20 is 177/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 35 × 4 = 140,
15/35 = 15 × 4/35 × 4 = 60/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
42/20 = 42 × 7/20 × 7 = 294/140 - Add the two like fractions:
60/140 + 294/140 = 60 + 294/140 = 354/140 - 354/140 simplified gives 177/70
- So, 15/35 + 42/20 = 177/70
In mixed form: 237/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/35+42/20 15/35+84/20 15/70+42/20 15/35+42/40 45/35+42/20 15/35+42/60 75/35+42/20