Add 90/15 and 42/5
1st number: 6 0/15, 2nd number: 8 2/5
90/15 + 42/5 is 72/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 5 is 15
Next, find the equivalent fraction of both fractional numbers with denominator 15 - For the 1st fraction, since 15 × 1 = 15,
90/15 = 90 × 1/15 × 1 = 90/15 - Likewise, for the 2nd fraction, since 5 × 3 = 15,
42/5 = 42 × 3/5 × 3 = 126/15 - Add the two like fractions:
90/15 + 126/15 = 90 + 126/15 = 216/15 - 216/15 simplified gives 72/5
- So, 90/15 + 42/5 = 72/5
In mixed form: 142/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+84/5 90/30+42/5 90/15+42/10 90/45+42/5 90/15+42/15 90/75+42/5 90/15+42/25 90/15+42/35