Add 18/10 and 81/80
1st number: 1 8/10, 2nd number: 1 1/80
18/10 + 81/80 is 45/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 10 × 8 = 80,
18/10 = 18 × 8/10 × 8 = 144/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
81/80 = 81 × 1/80 × 1 = 81/80 - Add the two like fractions:
144/80 + 81/80 = 144 + 81/80 = 225/80 - 225/80 simplified gives 45/16
- So, 18/10 + 81/80 = 45/16
In mixed form: 213/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/10+81/80 18/20+81/80 54/10+81/80 18/30+81/80 90/10+81/80 18/50+81/80 18/70+81/80