Add 30/80 and 8/5
1st number: 30/80, 2nd number: 1 3/5
30/80 + 8/5 is 79/40.
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,
8/5 = 8 × 16/5 × 16 = 128/80 - Add the two like fractions:
30/80 + 128/80 = 30 + 128/80 = 158/80 - 158/80 simplified gives 79/40
- So, 30/80 + 8/5 = 79/40
In mixed form: 139/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80+8/5 30/80+16/5 30/80+8/10 90/80+8/5 30/80+24/5 30/80+8/15 30/80+40/5 30/80+8/25 30/80+56/5 30/80+8/35