Add 12/80 and 45/30
1st number: 12/80, 2nd number: 1 15/30
12/80 + 45/30 is 33/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
12/80 = 12 × 3/80 × 3 = 36/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
45/30 = 45 × 8/30 × 8 = 360/240 - Add the two like fractions:
36/240 + 360/240 = 36 + 360/240 = 396/240 - 396/240 simplified gives 33/20
- So, 12/80 + 45/30 = 33/20
In mixed form: 113/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/80+45/30 12/80+90/30 12/80+45/60 36/80+45/30 12/80+45/90 60/80+45/30 84/80+45/30