Add 72/12 and 75/20
1st number: 6 0/12, 2nd number: 3 15/20
72/12 + 75/20 is 39/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
72/12 = 72 × 5/12 × 5 = 360/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
75/20 = 75 × 3/20 × 3 = 225/60 - Add the two like fractions:
360/60 + 225/60 = 360 + 225/60 = 585/60 - 585/60 simplified gives 39/4
- So, 72/12 + 75/20 = 39/4
In mixed form: 93/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/24+75/20 72/12+75/40 72/36+75/20 72/12+75/60 72/60+75/20 72/84+75/20