Add 12/20 and 54/72
12/20 + 54/72 is 27/20.
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,
12/20 = 12 × 18/20 × 18 = 216/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
54/72 = 54 × 5/72 × 5 = 270/360 - Add the two like fractions:
216/360 + 270/360 = 216 + 270/360 = 486/360 - 486/360 simplified gives 27/20
- So, 12/20 + 54/72 = 27/20
In mixed form: 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20+54/72 12/40+54/72 36/20+54/72 12/60+54/72 60/20+54/72 84/20+54/72