Add 20/56 and 30/18
1st number: 20/56, 2nd number: 1 12/18
20/56 + 30/18 is 85/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 18 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 56 × 9 = 504,
20/56 = 20 × 9/56 × 9 = 180/504 - Likewise, for the 2nd fraction, since 18 × 28 = 504,
30/18 = 30 × 28/18 × 28 = 840/504 - Add the two like fractions:
180/504 + 840/504 = 180 + 840/504 = 1020/504 - 1020/504 simplified gives 85/42
- So, 20/56 + 30/18 = 85/42
In mixed form: 21/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/56+30/18 20/56+60/18 20/56+30/36 60/56+30/18 20/56+90/18 20/56+30/54 20/56+30/90