Add 20/36 and 45/56
20/36 + 45/56 is 685/504.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 36 × 14 = 504,
20/36 = 20 × 14/36 × 14 = 280/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
45/56 = 45 × 9/56 × 9 = 405/504 - Add the two like fractions:
280/504 + 405/504 = 280 + 405/504 = 685/504 - So, 20/36 + 45/56 = 685/504
In mixed form: 1181/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36+45/56 20/36+90/56 20/72+45/56 60/36+45/56