Add 42/90 and 7/5
1st number: 42/90, 2nd number: 1 2/5
42/90 + 7/5 is 28/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
7/5 = 7 × 18/5 × 18 = 126/90 - Add the two like fractions:
42/90 + 126/90 = 42 + 126/90 = 168/90 - 168/90 simplified gives 28/15
- So, 42/90 + 7/5 = 28/15
In mixed form: 113/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90+7/5 42/90+14/5 42/90+7/10 42/90+21/5 42/90+7/15 42/90+35/5 42/90+7/25 42/90+49/5 42/90+7/35