Add 15/18 and 25/56
15/18 + 25/56 is 215/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 18 × 28 = 504,
15/18 = 15 × 28/18 × 28 = 420/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
25/56 = 25 × 9/56 × 9 = 225/504 - Add the two like fractions:
420/504 + 225/504 = 420 + 225/504 = 645/504 - 645/504 simplified gives 215/168
- So, 15/18 + 25/56 = 215/168
In mixed form: 147/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+25/56 15/18+50/56 15/36+25/56 45/18+25/56 15/18+75/56 15/54+25/56 75/18+25/56 15/90+25/56