Add 72/12 and 20/80
1st number: 6 0/12, 2nd number: 20/80
72/12 + 20/80 is 25/4.
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,
72/12 = 72 × 20/12 × 20 = 1440/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
20/80 = 20 × 3/80 × 3 = 60/240 - Add the two like fractions:
1440/240 + 60/240 = 1440 + 60/240 = 1500/240 - 1500/240 simplified gives 25/4
- So, 72/12 + 20/80 = 25/4
In mixed form: 61/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/12+40/80 72/24+20/80 72/12+60/80 72/36+20/80 72/60+20/80 72/84+20/80