Add 15/50 and 80/90
15/50 + 80/90 is 107/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
15/50 = 15 × 9/50 × 9 = 135/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
80/90 = 80 × 5/90 × 5 = 400/450 - Add the two like fractions:
135/450 + 400/450 = 135 + 400/450 = 535/450 - 535/450 simplified gives 107/90
- So, 15/50 + 80/90 = 107/90
In mixed form: 117/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/50+80/90 45/50+80/90 75/50+80/90