Add 15/28 and 27/90
15/28 + 27/90 is 117/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
15/28 = 15 × 45/28 × 45 = 675/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
27/90 = 27 × 14/90 × 14 = 378/1260 - Add the two like fractions:
675/1260 + 378/1260 = 675 + 378/1260 = 1053/1260 - 1053/1260 simplified gives 117/140
- So, 15/28 + 27/90 = 117/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28+27/90 15/28+54/90 15/56+27/90 45/28+27/90 15/28+81/90 15/84+27/90 75/28+27/90