Add 90/2 and 21/12
1st number: 45 0/2, 2nd number: 1 9/12
90/2 + 21/12 is 187/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 2 × 6 = 12,
90/2 = 90 × 6/2 × 6 = 540/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
21/12 = 21 × 1/12 × 1 = 21/12 - Add the two like fractions:
540/12 + 21/12 = 540 + 21/12 = 561/12 - 561/12 simplified gives 187/4
- So, 90/2 + 21/12 = 187/4
In mixed form: 463/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/2+42/12 90/4+21/12 90/2+21/24 90/2+63/12 90/6+21/12 90/2+21/36 90/10+21/12 90/2+21/60 90/14+21/12 90/2+21/84