Add 20/5 and 8/7
1st number: 4 0/5, 2nd number: 1 1/7
20/5 + 8/7 is 36/7.
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,
8/7 = 8 × 5/7 × 5 = 40/35 - Add the two like fractions:
140/35 + 40/35 = 140 + 40/35 = 180/35 - 180/35 simplified gives 36/7
- So, 20/5 + 8/7 = 36/7
In mixed form: 51/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5+8/7 20/5+16/7 20/10+8/7 20/5+8/14 60/5+8/7 20/5+24/7 20/15+8/7 20/5+8/21 20/5+40/7 20/25+8/7 20/5+8/35 20/5+56/7 20/35+8/7 20/5+8/49