Add 7/8 and 7/40
7/8 + 7/40 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
7/8 = 7 × 5/8 × 5 = 35/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
7/40 = 7 × 1/40 × 1 = 7/40 - Add the two like fractions:
35/40 + 7/40 = 35 + 7/40 = 42/40 - 42/40 simplified gives 21/20
- So, 7/8 + 7/40 = 21/20
In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/8+7/40 7/8+14/40 7/16+7/40 7/8+7/80 21/8+7/40 7/8+21/40 7/24+7/40 35/8+7/40 7/8+35/40 7/40+7/40 49/8+7/40 7/8+49/40 7/56+7/40