Add 7/20 and 7/8
7/20 + 7/8 is 49/40.
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,
7/8 = 7 × 5/8 × 5 = 35/40 - Add the two like fractions:
14/40 + 35/40 = 14 + 35/40 = 49/40 - So, 7/20 + 7/8 = 49/40
In mixed form: 19/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20+7/8 7/20+14/8 7/40+7/8 7/20+7/16 21/20+7/8 7/20+21/8 7/60+7/8 7/20+7/24 35/20+7/8 7/20+35/8 7/20+7/40 49/20+7/8 7/20+49/8 7/20+7/56