Add 80/20 and 84/72
1st number: 4 0/20, 2nd number: 1 12/72
80/20 + 84/72 is 31/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
80/20 = 80 × 18/20 × 18 = 1440/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
84/72 = 84 × 5/72 × 5 = 420/360 - Add the two like fractions:
1440/360 + 420/360 = 1440 + 420/360 = 1860/360 - 1860/360 simplified gives 31/6
- So, 80/20 + 84/72 = 31/6
In mixed form: 51/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/40+84/72 80/60+84/72