Add 18/80 and 15/10
1st number: 18/80, 2nd number: 1 5/10
18/80 + 15/10 is 69/40.
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,
15/10 = 15 × 8/10 × 8 = 120/80 - Add the two like fractions:
18/80 + 120/80 = 18 + 120/80 = 138/80 - 138/80 simplified gives 69/40
- So, 18/80 + 15/10 = 69/40
In mixed form: 129/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/80+15/10 18/80+30/10 18/80+15/20 54/80+15/10 18/80+45/10 18/80+15/30 90/80+15/10 18/80+75/10 18/80+15/50 18/80+15/70