Add 18/90 and 42/15
1st number: 18/90, 2nd number: 2 12/15
18/90 + 42/15 is 3/1.
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,
18/90 = 18 × 1/90 × 1 = 18/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
42/15 = 42 × 6/15 × 6 = 252/90 - Add the two like fractions:
18/90 + 252/90 = 18 + 252/90 = 270/90 - 270/90 simplified gives 3/1
- So, 18/90 + 42/15 = 3/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/90+42/15 18/90+84/15 18/90+42/30 54/90+42/15 18/90+42/45 18/90+42/75