Add 70/80 and 9/28
70/80 + 9/28 is 67/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 28 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
70/80 = 70 × 7/80 × 7 = 490/560 - Likewise, for the 2nd fraction, since 28 × 20 = 560,
9/28 = 9 × 20/28 × 20 = 180/560 - Add the two like fractions:
490/560 + 180/560 = 490 + 180/560 = 670/560 - 670/560 simplified gives 67/56
- So, 70/80 + 9/28 = 67/56
In mixed form: 111/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/80+18/28 70/80+9/56 70/80+27/28 70/80+9/84 70/80+45/28 70/80+63/28