Add 90/15 and 9/28
1st number: 6 0/15, 2nd number: 9/28
90/15 + 9/28 is 177/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
90/15 = 90 × 28/15 × 28 = 2520/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
9/28 = 9 × 15/28 × 15 = 135/420 - Add the two like fractions:
2520/420 + 135/420 = 2520 + 135/420 = 2655/420 - 2655/420 simplified gives 177/28
- So, 90/15 + 9/28 = 177/28
In mixed form: 69/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+18/28 90/30+9/28 90/15+9/56 90/15+27/28 90/45+9/28 90/15+9/84 90/15+45/28 90/75+9/28 90/15+63/28