Add 42/80 and 6/9
42/80 + 6/9 is 143/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
42/80 = 42 × 9/80 × 9 = 378/720 - Likewise, for the 2nd fraction, since 9 × 80 = 720,
6/9 = 6 × 80/9 × 80 = 480/720 - Add the two like fractions:
378/720 + 480/720 = 378 + 480/720 = 858/720 - 858/720 simplified gives 143/120
- So, 42/80 + 6/9 = 143/120
In mixed form: 123/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80+6/9 42/80+12/9 42/80+6/18 42/80+18/9 42/80+6/27 42/80+30/9 42/80+6/45 42/80+42/9 42/80+6/63