Add 18/80 and 9/10
18/80 + 9/10 is 9/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 10 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
18/80 = 18 × 1/80 × 1 = 18/80 - Likewise, for the 2nd fraction, since 10 × 8 = 80,
9/10 = 9 × 8/10 × 8 = 72/80 - Add the two like fractions:
18/80 + 72/80 = 18 + 72/80 = 90/80 - 90/80 simplified gives 9/8
- So, 18/80 + 9/10 = 9/8
In mixed form: 11/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/80+9/10 18/80+18/10 18/80+9/20 54/80+9/10 18/80+27/10 18/80+9/30 90/80+9/10 18/80+45/10 18/80+9/50 18/80+63/10 18/80+9/70