Add 12/90 and 12/80
12/90 + 12/80 is 17/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
12/90 = 12 × 8/90 × 8 = 96/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
12/80 = 12 × 9/80 × 9 = 108/720 - Add the two like fractions:
96/720 + 108/720 = 96 + 108/720 = 204/720 - 204/720 simplified gives 17/60
- So, 12/90 + 12/80 = 17/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90+12/80 12/90+24/80 36/90+12/80 12/90+36/80 60/90+12/80 12/90+60/80 84/90+12/80 12/90+84/80