Add 72/35 and 70/20
1st number: 2 2/35, 2nd number: 3 10/20
72/35 + 70/20 is 389/70.
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,
70/20 = 70 × 7/20 × 7 = 490/140 - Add the two like fractions:
288/140 + 490/140 = 288 + 490/140 = 778/140 - 778/140 simplified gives 389/70
- So, 72/35 + 70/20 = 389/70
In mixed form: 539/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/70+70/20 72/35+70/40 72/35+70/60