Add 30/80 and 45/36
1st number: 30/80, 2nd number: 1 9/36
30/80 + 45/36 is 13/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 36 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
30/80 = 30 × 9/80 × 9 = 270/720 - Likewise, for the 2nd fraction, since 36 × 20 = 720,
45/36 = 45 × 20/36 × 20 = 900/720 - Add the two like fractions:
270/720 + 900/720 = 270 + 900/720 = 1170/720 - 1170/720 simplified gives 13/8
- So, 30/80 + 45/36 = 13/8
In mixed form: 15/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80+45/36 30/80+90/36 30/80+45/72 90/80+45/36