Add 30/80 and 12/5
1st number: 30/80, 2nd number: 2 2/5
30/80 + 12/5 is 111/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 5 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
30/80 = 30 × 1/80 × 1 = 30/80 - Likewise, for the 2nd fraction, since 5 × 16 = 80,
12/5 = 12 × 16/5 × 16 = 192/80 - Add the two like fractions:
30/80 + 192/80 = 30 + 192/80 = 222/80 - 222/80 simplified gives 111/40
- So, 30/80 + 12/5 = 111/40
In mixed form: 231/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80+12/5 30/80+24/5 30/80+12/10 90/80+12/5 30/80+36/5 30/80+12/15 30/80+60/5 30/80+12/25 30/80+84/5 30/80+12/35