Add 12/80 and 70/72
12/80 + 70/72 is 101/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 72 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 72 × 10 = 720,
70/72 = 70 × 10/72 × 10 = 700/720 - Add the two like fractions:
108/720 + 700/720 = 108 + 700/720 = 808/720 - 808/720 simplified gives 101/90
- So, 12/80 + 70/72 = 101/90
In mixed form: 111/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/80+70/72 36/80+70/72 60/80+70/72 84/80+70/72