Add 42/18 and 40/20
1st number: 2 6/18, 2nd number: 2 0/20
42/18 + 40/20 is 13/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
42/18 = 42 × 10/18 × 10 = 420/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
40/20 = 40 × 9/20 × 9 = 360/180 - Add the two like fractions:
420/180 + 360/180 = 420 + 360/180 = 780/180 - 780/180 simplified gives 13/3
- So, 42/18 + 40/20 = 13/3
In mixed form: 41/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18+40/20 42/18+80/20 42/36+40/20 42/54+40/20 42/18+40/60 42/90+40/20