Add 12/90 and 21/6
1st number: 12/90, 2nd number: 3 3/6
12/90 + 21/6 is 109/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 6 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
12/90 = 12 × 1/90 × 1 = 12/90 - Likewise, for the 2nd fraction, since 6 × 15 = 90,
21/6 = 21 × 15/6 × 15 = 315/90 - Add the two like fractions:
12/90 + 315/90 = 12 + 315/90 = 327/90 - 327/90 simplified gives 109/30
- So, 12/90 + 21/6 = 109/30
In mixed form: 319/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90+21/6 12/90+42/6 12/90+21/12 36/90+21/6 12/90+63/6 12/90+21/18 60/90+21/6 12/90+21/30 84/90+21/6 12/90+21/42