Add 21/30 and 40/12
1st number: 21/30, 2nd number: 3 4/12
21/30 + 40/12 is 121/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
40/12 = 40 × 5/12 × 5 = 200/60 - Add the two like fractions:
42/60 + 200/60 = 42 + 200/60 = 242/60 - 242/60 simplified gives 121/30
- So, 21/30 + 40/12 = 121/30
In mixed form: 41/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+40/12 21/30+80/12 21/60+40/12 21/30+40/24 63/30+40/12 21/90+40/12 21/30+40/36 21/30+40/60 21/30+40/84