Add 84/5 and 20/7
1st number: 16 4/5, 2nd number: 2 6/7
84/5 + 20/7 is 688/35.
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,
84/5 = 84 × 7/5 × 7 = 588/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
20/7 = 20 × 5/7 × 5 = 100/35 - Add the two like fractions:
588/35 + 100/35 = 588 + 100/35 = 688/35 - So, 84/5 + 20/7 = 688/35
In mixed form: 1923/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/5+40/7 84/10+20/7 84/5+20/14 84/5+60/7 84/15+20/7 84/5+20/21 84/25+20/7 84/5+20/35 84/35+20/7 84/5+20/49