Add 3/12 and 60/21
1st number: 3/12, 2nd number: 2 18/21
3/12 + 60/21 is 87/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
3/12 = 3 × 7/12 × 7 = 21/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
60/21 = 60 × 4/21 × 4 = 240/84 - Add the two like fractions:
21/84 + 240/84 = 21 + 240/84 = 261/84 - 261/84 simplified gives 87/28
- So, 3/12 + 60/21 = 87/28
In mixed form: 33/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+60/21 3/24+60/21 3/12+60/42 9/12+60/21 3/36+60/21 3/12+60/63 15/12+60/21 3/60+60/21 21/12+60/21 3/84+60/21