Add 28/12 and 42/80
1st number: 2 4/12, 2nd number: 42/80
28/12 + 42/80 is 343/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 12 × 20 = 240,
28/12 = 28 × 20/12 × 20 = 560/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
42/80 = 42 × 3/80 × 3 = 126/240 - Add the two like fractions:
560/240 + 126/240 = 560 + 126/240 = 686/240 - 686/240 simplified gives 343/120
- So, 28/12 + 42/80 = 343/120
In mixed form: 2103/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12+42/80 28/12+84/80 28/24+42/80 84/12+42/80 28/36+42/80 28/60+42/80 28/84+42/80