Add 15/28 and 20/45
15/28 + 20/45 is 247/252.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 45 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 45 × 28 = 1260,
20/45 = 20 × 28/45 × 28 = 560/1260 - Add the two like fractions:
675/1260 + 560/1260 = 675 + 560/1260 = 1235/1260 - 1235/1260 simplified gives 247/252
- So, 15/28 + 20/45 = 247/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/28+20/45 15/28+40/45 15/56+20/45 15/28+20/90 45/28+20/45 15/28+60/45 15/84+20/45 75/28+20/45