Add 45/80 and 30/20
1st number: 45/80, 2nd number: 1 10/20
45/80 + 30/20 is 33/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
45/80 = 45 × 1/80 × 1 = 45/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
30/20 = 30 × 4/20 × 4 = 120/80 - Add the two like fractions:
45/80 + 120/80 = 45 + 120/80 = 165/80 - 165/80 simplified gives 33/16
- So, 45/80 + 30/20 = 33/16
In mixed form: 21/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+30/20 45/80+60/20 45/80+30/40 45/80+90/20 45/80+30/60