Add 10/18 and 27/21
1st number: 10/18, 2nd number: 1 6/21
10/18 + 27/21 is 116/63.
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,
10/18 = 10 × 7/18 × 7 = 70/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
27/21 = 27 × 6/21 × 6 = 162/126 - Add the two like fractions:
70/126 + 162/126 = 70 + 162/126 = 232/126 - 232/126 simplified gives 116/63
- So, 10/18 + 27/21 = 116/63
In mixed form: 153/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/18+27/21 10/18+54/21 10/36+27/21 10/18+27/42 30/18+27/21 10/18+81/21 10/54+27/21 10/18+27/63 50/18+27/21 10/90+27/21 70/18+27/21