Add 18/80 and 40/20
1st number: 18/80, 2nd number: 2 0/20
18/80 + 40/20 is 89/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
18/80 = 18 × 1/80 × 1 = 18/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
40/20 = 40 × 4/20 × 4 = 160/80 - Add the two like fractions:
18/80 + 160/80 = 18 + 160/80 = 178/80 - 178/80 simplified gives 89/40
- So, 18/80 + 40/20 = 89/40
In mixed form: 29/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/80+40/20 18/80+80/20 54/80+40/20 18/80+40/60 90/80+40/20