Add 18/8 and 40/20
1st number: 2 2/8, 2nd number: 2 0/20
18/8 + 40/20 is 17/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
18/8 = 18 × 5/8 × 5 = 90/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
40/20 = 40 × 2/20 × 2 = 80/40 - Add the two like fractions:
90/40 + 80/40 = 90 + 80/40 = 170/40 - 170/40 simplified gives 17/4
- So, 18/8 + 40/20 = 17/4
In mixed form: 41/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+40/20 18/8+80/20 18/16+40/20 54/8+40/20 18/24+40/20 18/8+40/60 90/8+40/20 18/40+40/20 18/56+40/20