Add 12/80 and 36/90
12/80 + 36/90 is 11/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
12/80 = 12 × 9/80 × 9 = 108/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
36/90 = 36 × 8/90 × 8 = 288/720 - Add the two like fractions:
108/720 + 288/720 = 108 + 288/720 = 396/720 - 396/720 simplified gives 11/20
- So, 12/80 + 36/90 = 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/80+36/90 12/80+72/90 36/80+36/90 60/80+36/90 84/80+36/90