Add 7/20 and 81/8
1st number: 7/20, 2nd number: 10 1/8
7/20 + 81/8 is 419/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
7/20 = 7 × 2/20 × 2 = 14/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
81/8 = 81 × 5/8 × 5 = 405/40 - Add the two like fractions:
14/40 + 405/40 = 14 + 405/40 = 419/40 - So, 7/20 + 81/8 = 419/40
In mixed form: 1019/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20+81/8 7/40+81/8 7/20+81/16 21/20+81/8 7/60+81/8 7/20+81/24 35/20+81/8 7/20+81/40 49/20+81/8 7/20+81/56