Add 54/90 and 27/60
54/90 + 27/60 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 60 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
54/90 = 54 × 2/90 × 2 = 108/180 - Likewise, for the 2nd fraction, since 60 × 3 = 180,
27/60 = 27 × 3/60 × 3 = 81/180 - Add the two like fractions:
108/180 + 81/180 = 108 + 81/180 = 189/180 - 189/180 simplified gives 21/20
- So, 54/90 + 27/60 = 21/20
In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/90+54/60 54/90+81/60