Add 25/28 and 3/15
25/28 + 3/15 is 153/140.
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,
25/28 = 25 × 15/28 × 15 = 375/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
3/15 = 3 × 28/15 × 28 = 84/420 - Add the two like fractions:
375/420 + 84/420 = 375 + 84/420 = 459/420 - 459/420 simplified gives 153/140
- So, 25/28 + 3/15 = 153/140
In mixed form: 113/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/28+3/15 25/28+6/15 25/56+3/15 25/28+3/30 75/28+3/15 25/28+9/15 25/84+3/15 25/28+3/45 25/28+3/75 25/28+21/15