Add 9/18 and 42/80
9/18 + 42/80 is 41/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
9/18 = 9 × 40/18 × 40 = 360/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
42/80 = 42 × 9/80 × 9 = 378/720 - Add the two like fractions:
360/720 + 378/720 = 360 + 378/720 = 738/720 - 738/720 simplified gives 41/40
- So, 9/18 + 42/80 = 41/40
In mixed form: 11/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 9/18+84/80 9/36+42/80 27/18+42/80 9/54+42/80 45/18+42/80 9/90+42/80 63/18+42/80