Add 80/90 and 15/10
1st number: 80/90, 2nd number: 1 5/10
80/90 + 15/10 is 43/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
80/90 = 80 × 1/90 × 1 = 80/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
15/10 = 15 × 9/10 × 9 = 135/90 - Add the two like fractions:
80/90 + 135/90 = 80 + 135/90 = 215/90 - 215/90 simplified gives 43/18
- So, 80/90 + 15/10 = 43/18
In mixed form: 27/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90+30/10 80/90+15/20 80/90+45/10 80/90+15/30 80/90+75/10 80/90+15/50 80/90+15/70