Add 20/15 and 90/75
1st number: 1 5/15, 2nd number: 1 15/75
20/15 + 90/75 is 38/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 75 is 75
Next, find the equivalent fraction of both fractional numbers with denominator 75 - For the 1st fraction, since 15 × 5 = 75,
20/15 = 20 × 5/15 × 5 = 100/75 - Likewise, for the 2nd fraction, since 75 × 1 = 75,
90/75 = 90 × 1/75 × 1 = 90/75 - Add the two like fractions:
100/75 + 90/75 = 100 + 90/75 = 190/75 - 190/75 simplified gives 38/15
- So, 20/15 + 90/75 = 38/15
In mixed form: 28/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+90/75 20/30+90/75 60/15+90/75 20/45+90/75 20/75+90/75