Add 84/12 and 20/80
1st number: 7 0/12, 2nd number: 20/80
84/12 + 20/80 is 29/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 12 × 20 = 240,
84/12 = 84 × 20/12 × 20 = 1680/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
20/80 = 20 × 3/80 × 3 = 60/240 - Add the two like fractions:
1680/240 + 60/240 = 1680 + 60/240 = 1740/240 - 1740/240 simplified gives 29/4
- So, 84/12 + 20/80 = 29/4
In mixed form: 71/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12+40/80 84/24+20/80 84/12+60/80 84/36+20/80 84/60+20/80