Add 12/7 and 42/80
1st number: 1 5/7, 2nd number: 42/80
12/7 + 42/80 is 627/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 7 × 80 = 560,
12/7 = 12 × 80/7 × 80 = 960/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
42/80 = 42 × 7/80 × 7 = 294/560 - Add the two like fractions:
960/560 + 294/560 = 960 + 294/560 = 1254/560 - 1254/560 simplified gives 627/280
- So, 12/7 + 42/80 = 627/280
In mixed form: 267/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7+42/80 12/7+84/80 12/14+42/80 36/7+42/80 12/21+42/80 60/7+42/80 12/35+42/80 84/7+42/80 12/49+42/80