Add 28/70 and 84/80
1st number: 28/70, 2nd number: 1 4/80
28/70 + 84/80 is 29/20.
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,
28/70 = 28 × 8/70 × 8 = 224/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
84/80 = 84 × 7/80 × 7 = 588/560 - Add the two like fractions:
224/560 + 588/560 = 224 + 588/560 = 812/560 - 812/560 simplified gives 29/20
- So, 28/70 + 84/80 = 29/20
In mixed form: 19/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70+84/80 84/70+84/80