Add 9/80 and 5/4
1st number: 9/80, 2nd number: 1 1/4
9/80 + 5/4 is 109/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 4 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
9/80 = 9 × 1/80 × 1 = 9/80 - Likewise, for the 2nd fraction, since 4 × 20 = 80,
5/4 = 5 × 20/4 × 20 = 100/80 - Add the two like fractions:
9/80 + 100/80 = 9 + 100/80 = 109/80 - So, 9/80 + 5/4 = 109/80
In mixed form: 129/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/80+5/4 9/80+10/4 9/80+5/8 27/80+5/4 9/80+15/4 9/80+5/12 45/80+5/4 9/80+25/4 9/80+5/20 63/80+5/4 9/80+35/4 9/80+5/28