Add 81/10 and 2/5
1st number: 8 1/10, 2nd number: 2/5
81/10 + 2/5 is 17/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 5 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 10 × 1 = 10,
81/10 = 81 × 1/10 × 1 = 81/10 - Likewise, for the 2nd fraction, since 5 × 2 = 10,
2/5 = 2 × 2/5 × 2 = 4/10 - Add the two like fractions:
81/10 + 4/10 = 81 + 4/10 = 85/10 - 85/10 simplified gives 17/2
- So, 81/10 + 2/5 = 17/2
In mixed form: 81/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/10+4/5 81/20+2/5 81/10+2/10 81/10+6/5 81/30+2/5 81/10+2/15 81/10+10/5 81/50+2/5 81/10+2/25 81/10+14/5 81/70+2/5 81/10+2/35