Add 56/80 and 18/12
1st number: 56/80, 2nd number: 1 6/12
56/80 + 18/12 is 11/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 12 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
56/80 = 56 × 3/80 × 3 = 168/240 - Likewise, for the 2nd fraction, since 12 × 20 = 240,
18/12 = 18 × 20/12 × 20 = 360/240 - Add the two like fractions:
168/240 + 360/240 = 168 + 360/240 = 528/240 - 528/240 simplified gives 11/5
- So, 56/80 + 18/12 = 11/5
In mixed form: 21/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/80+36/12 56/80+18/24 56/80+54/12 56/80+18/36 56/80+90/12 56/80+18/60 56/80+18/84