Add 9/28 and 12/15
9/28 + 12/15 is 157/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
9/28 = 9 × 15/28 × 15 = 135/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
12/15 = 12 × 28/15 × 28 = 336/420 - Add the two like fractions:
135/420 + 336/420 = 135 + 336/420 = 471/420 - 471/420 simplified gives 157/140
- So, 9/28 + 12/15 = 157/140
In mixed form: 117/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28+12/15 9/28+24/15 9/56+12/15 9/28+12/30 27/28+12/15 9/28+36/15 9/84+12/15 9/28+12/45 45/28+12/15 9/28+60/15 9/28+12/75 63/28+12/15 9/28+84/15