Add 15/20 and 27/72
15/20 + 27/72 is 9/8.
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,
15/20 = 15 × 18/20 × 18 = 270/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
27/72 = 27 × 5/72 × 5 = 135/360 - Add the two like fractions:
270/360 + 135/360 = 270 + 135/360 = 405/360 - 405/360 simplified gives 9/8
- So, 15/20 + 27/72 = 9/8
In mixed form: 11/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20+27/72 15/20+54/72 15/40+27/72 45/20+27/72 15/20+81/72 15/60+27/72 75/20+27/72