Add 10/18 and 20/21
10/18 + 20/21 is 95/63.
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,
20/21 = 20 × 6/21 × 6 = 120/126 - Add the two like fractions:
70/126 + 120/126 = 70 + 120/126 = 190/126 - 190/126 simplified gives 95/63
- So, 10/18 + 20/21 = 95/63
In mixed form: 132/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/18+20/21 10/18+40/21 10/36+20/21 10/18+20/42 30/18+20/21 10/18+60/21 10/54+20/21 10/18+20/63 50/18+20/21 10/90+20/21 70/18+20/21