Add 15/90 and 3/15
15/90 + 3/15 is 11/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
15/90 = 15 × 1/90 × 1 = 15/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
3/15 = 3 × 6/15 × 6 = 18/90 - Add the two like fractions:
15/90 + 18/90 = 15 + 18/90 = 33/90 - 33/90 simplified gives 11/30
- So, 15/90 + 3/15 = 11/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90+3/15 15/90+6/15 15/90+3/30 45/90+3/15 15/90+9/15 15/90+3/45 75/90+3/15 15/90+3/75 15/90+21/15