Add 80/28 and 9/90
1st number: 2 24/28, 2nd number: 9/90
80/28 + 9/90 is 207/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
80/28 = 80 × 45/28 × 45 = 3600/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
9/90 = 9 × 14/90 × 14 = 126/1260 - Add the two like fractions:
3600/1260 + 126/1260 = 3600 + 126/1260 = 3726/1260 - 3726/1260 simplified gives 207/70
- So, 80/28 + 9/90 = 207/70
In mixed form: 267/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/28+18/90 80/56+9/90 80/28+27/90 80/84+9/90 80/28+45/90 80/28+63/90