Add 81/10 and 7/8
1st number: 8 1/10, 2nd number: 7/8
81/10 + 7/8 is 359/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
81/10 = 81 × 4/10 × 4 = 324/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
7/8 = 7 × 5/8 × 5 = 35/40 - Add the two like fractions:
324/40 + 35/40 = 324 + 35/40 = 359/40 - So, 81/10 + 7/8 = 359/40
In mixed form: 839/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/10+14/8 81/20+7/8 81/10+7/16 81/10+21/8 81/30+7/8 81/10+7/24 81/10+35/8 81/50+7/8 81/10+7/40 81/10+49/8 81/70+7/8 81/10+7/56