Add 12/18 and 60/21
1st number: 12/18, 2nd number: 2 18/21
12/18 + 60/21 is 74/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
12/18 = 12 × 7/18 × 7 = 84/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
60/21 = 60 × 6/21 × 6 = 360/126 - Add the two like fractions:
84/126 + 360/126 = 84 + 360/126 = 444/126 - 444/126 simplified gives 74/21
- So, 12/18 + 60/21 = 74/21
In mixed form: 311/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18+60/21 12/36+60/21 12/18+60/42 36/18+60/21 12/54+60/21 12/18+60/63 60/18+60/21 12/90+60/21 84/18+60/21