Add 80/7 and 42/70
1st number: 11 3/7, 2nd number: 42/70
80/7 + 42/70 is 421/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
80/7 = 80 × 10/7 × 10 = 800/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
42/70 = 42 × 1/70 × 1 = 42/70 - Add the two like fractions:
800/70 + 42/70 = 800 + 42/70 = 842/70 - 842/70 simplified gives 421/35
- So, 80/7 + 42/70 = 421/35
In mixed form: 121/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/7+84/70 80/14+42/70 80/21+42/70 80/35+42/70 80/49+42/70