Add 20/5 and 80/7
1st number: 4 0/5, 2nd number: 11 3/7
20/5 + 80/7 is 108/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 5 × 7 = 35,
20/5 = 20 × 7/5 × 7 = 140/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
80/7 = 80 × 5/7 × 5 = 400/35 - Add the two like fractions:
140/35 + 400/35 = 140 + 400/35 = 540/35 - 540/35 simplified gives 108/7
- So, 20/5 + 80/7 = 108/7
In mixed form: 153/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5+80/7 20/10+80/7 20/5+80/14 60/5+80/7 20/15+80/7 20/5+80/21 20/25+80/7 20/5+80/35 20/35+80/7 20/5+80/49