Add 21/28 and 2/15
21/28 + 2/15 is 53/60.
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,
21/28 = 21 × 15/28 × 15 = 315/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
2/15 = 2 × 28/15 × 28 = 56/420 - Add the two like fractions:
315/420 + 56/420 = 315 + 56/420 = 371/420 - 371/420 simplified gives 53/60
- So, 21/28 + 2/15 = 53/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+2/15 21/28+4/15 21/56+2/15 21/28+2/30 63/28+2/15 21/28+6/15 21/84+2/15 21/28+2/45 21/28+10/15 21/28+2/75 21/28+14/15