Add 9/15 and 20/90
9/15 + 20/90 is 37/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
9/15 = 9 × 6/15 × 6 = 54/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Add the two like fractions:
54/90 + 20/90 = 54 + 20/90 = 74/90 - 74/90 simplified gives 37/45
- So, 9/15 + 20/90 = 37/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15+20/90 9/15+40/90 9/30+20/90 27/15+20/90 9/15+60/90 9/45+20/90 45/15+20/90 9/75+20/90 63/15+20/90