Add 30/90 and 42/35
1st number: 30/90, 2nd number: 1 7/35
30/90 + 42/35 is 23/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 35 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
30/90 = 30 × 7/90 × 7 = 210/630 - Likewise, for the 2nd fraction, since 35 × 18 = 630,
42/35 = 42 × 18/35 × 18 = 756/630 - Add the two like fractions:
210/630 + 756/630 = 210 + 756/630 = 966/630 - 966/630 simplified gives 23/15
- So, 30/90 + 42/35 = 23/15
In mixed form: 18/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/90+42/35 30/90+84/35 30/90+42/70