Add 54/90 and 3/12
54/90 + 3/12 is 17/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 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 12 × 15 = 180,
3/12 = 3 × 15/12 × 15 = 45/180 - Add the two like fractions:
108/180 + 45/180 = 108 + 45/180 = 153/180 - 153/180 simplified gives 17/20
- So, 54/90 + 3/12 = 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/90+6/12 54/90+3/24 54/90+9/12 54/90+3/36 54/90+15/12 54/90+3/60 54/90+21/12 54/90+3/84