Add 81/2 and 20/7
1st number: 40 1/2, 2nd number: 2 6/7
81/2 + 20/7 is 607/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 7 is 14
Next, find the equivalent fraction of both fractional numbers with denominator 14 - For the 1st fraction, since 2 × 7 = 14,
81/2 = 81 × 7/2 × 7 = 567/14 - Likewise, for the 2nd fraction, since 7 × 2 = 14,
20/7 = 20 × 2/7 × 2 = 40/14 - Add the two like fractions:
567/14 + 40/14 = 567 + 40/14 = 607/14 - So, 81/2 + 20/7 = 607/14
In mixed form: 435/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/2+40/7 81/4+20/7 81/2+20/14 81/2+60/7 81/6+20/7 81/2+20/21 81/10+20/7 81/2+20/35 81/14+20/7 81/2+20/49