Add 56/45 and 15/20
1st number: 1 11/45, 2nd number: 15/20
56/45 + 15/20 is 359/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
56/45 = 56 × 4/45 × 4 = 224/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
15/20 = 15 × 9/20 × 9 = 135/180 - Add the two like fractions:
224/180 + 135/180 = 224 + 135/180 = 359/180 - So, 56/45 + 15/20 = 359/180
In mixed form: 1179/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/45+30/20 56/90+15/20 56/45+15/40 56/45+45/20 56/45+15/60 56/45+75/20