Add 56/18 and 15/40
1st number: 3 2/18, 2nd number: 15/40
56/18 + 15/40 is 251/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
56/18 = 56 × 20/18 × 20 = 1120/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
15/40 = 15 × 9/40 × 9 = 135/360 - Add the two like fractions:
1120/360 + 135/360 = 1120 + 135/360 = 1255/360 - 1255/360 simplified gives 251/72
- So, 56/18 + 15/40 = 251/72
In mixed form: 335/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+30/40 56/36+15/40 56/18+15/80 56/18+45/40 56/54+15/40 56/18+75/40 56/90+15/40