Add 56/80 and 20/18
1st number: 56/80, 2nd number: 1 2/18
56/80 + 20/18 is 163/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 18 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
56/80 = 56 × 9/80 × 9 = 504/720 - Likewise, for the 2nd fraction, since 18 × 40 = 720,
20/18 = 20 × 40/18 × 40 = 800/720 - Add the two like fractions:
504/720 + 800/720 = 504 + 800/720 = 1304/720 - 1304/720 simplified gives 163/90
- So, 56/80 + 20/18 = 163/90
In mixed form: 173/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/80+40/18 56/80+20/36 56/80+60/18 56/80+20/54 56/80+20/90