Add 60/18 and 9/21
1st number: 3 6/18, 2nd number: 9/21
60/18 + 9/21 is 79/21.
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,
60/18 = 60 × 7/18 × 7 = 420/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
9/21 = 9 × 6/21 × 6 = 54/126 - Add the two like fractions:
420/126 + 54/126 = 420 + 54/126 = 474/126 - 474/126 simplified gives 79/21
- So, 60/18 + 9/21 = 79/21
In mixed form: 316/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18+18/21 60/36+9/21 60/18+9/42 60/18+27/21 60/54+9/21 60/18+9/63 60/18+45/21 60/90+9/21 60/18+63/21