Add 90/54 and 21/12
1st number: 1 36/54, 2nd number: 1 9/12
90/54 + 21/12 is 41/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 12 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 54 × 2 = 108,
90/54 = 90 × 2/54 × 2 = 180/108 - Likewise, for the 2nd fraction, since 12 × 9 = 108,
21/12 = 21 × 9/12 × 9 = 189/108 - Add the two like fractions:
180/108 + 189/108 = 180 + 189/108 = 369/108 - 369/108 simplified gives 41/12
- So, 90/54 + 21/12 = 41/12
In mixed form: 35/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/54+42/12 90/54+21/24 90/54+63/12 90/54+21/36 90/54+21/60 90/54+21/84