Add 12/70 and 84/80
1st number: 12/70, 2nd number: 1 4/80
12/70 + 84/80 is 171/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
12/70 = 12 × 8/70 × 8 = 96/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
84/80 = 84 × 7/80 × 7 = 588/560 - Add the two like fractions:
96/560 + 588/560 = 96 + 588/560 = 684/560 - 684/560 simplified gives 171/140
- So, 12/70 + 84/80 = 171/140
In mixed form: 131/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/70+84/80 36/70+84/80 60/70+84/80 84/70+84/80