Add 15/30 and 9/18
15/30 + 9/18 is 1/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
15/30 = 15 × 3/30 × 3 = 45/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
9/18 = 9 × 5/18 × 5 = 45/90 - Add the two like fractions:
45/90 + 45/90 = 45 + 45/90 = 90/90 - 90/90 simplified gives 1/1
- So, 15/30 + 9/18 = 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/60+9/18 15/30+9/36 45/30+9/18 15/30+27/18 15/90+9/18 15/30+9/54 75/30+9/18 15/30+45/18 15/30+9/90 15/30+63/18