Add 18/2 and 42/80
1st number: 9 0/2, 2nd number: 42/80
18/2 + 42/80 is 381/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 2 × 40 = 80,
18/2 = 18 × 40/2 × 40 = 720/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Add the two like fractions:
720/80 + 42/80 = 720 + 42/80 = 762/80 - 762/80 simplified gives 381/40
- So, 18/2 + 42/80 = 381/40
In mixed form: 921/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/2+42/80 18/2+84/80 18/4+42/80 54/2+42/80 18/6+42/80 90/2+42/80 18/10+42/80 18/14+42/80