Add 9/4 and 28/80
1st number: 2 1/4, 2nd number: 28/80
9/4 + 28/80 is 13/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
9/4 = 9 × 20/4 × 20 = 180/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
28/80 = 28 × 1/80 × 1 = 28/80 - Add the two like fractions:
180/80 + 28/80 = 180 + 28/80 = 208/80 - 208/80 simplified gives 13/5
- So, 9/4 + 28/80 = 13/5
In mixed form: 23/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/4+28/80 9/4+56/80 9/8+28/80 27/4+28/80 9/4+84/80 9/12+28/80 45/4+28/80 9/20+28/80 63/4+28/80 9/28+28/80