Add 72/35 and 42/20
1st number: 2 2/35, 2nd number: 2 2/20
72/35 + 42/20 is 291/70.
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,
72/35 = 72 × 4/35 × 4 = 288/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
42/20 = 42 × 7/20 × 7 = 294/140 - Add the two like fractions:
288/140 + 294/140 = 288 + 294/140 = 582/140 - 582/140 simplified gives 291/70
- So, 72/35 + 42/20 = 291/70
In mixed form: 411/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/35+84/20 72/70+42/20 72/35+42/40 72/35+42/60