Add 90/9 and 42/15
1st number: 10 0/9, 2nd number: 2 12/15
90/9 + 42/15 is 64/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 15 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 9 × 5 = 45,
90/9 = 90 × 5/9 × 5 = 450/45 - Likewise, for the 2nd fraction, since 15 × 3 = 45,
42/15 = 42 × 3/15 × 3 = 126/45 - Add the two like fractions:
450/45 + 126/45 = 450 + 126/45 = 576/45 - 576/45 simplified gives 64/5
- So, 90/9 + 42/15 = 64/5
In mixed form: 124/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/9+84/15 90/18+42/15 90/9+42/30 90/27+42/15 90/9+42/45 90/45+42/15 90/9+42/75 90/63+42/15