Add 8/18 and 10/21
8/18 + 10/21 is 58/63.
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,
8/18 = 8 × 7/18 × 7 = 56/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
10/21 = 10 × 6/21 × 6 = 60/126 - Add the two like fractions:
56/126 + 60/126 = 56 + 60/126 = 116/126 - 116/126 simplified gives 58/63
- So, 8/18 + 10/21 = 58/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/18+10/21 8/18+20/21 8/36+10/21 8/18+10/42 24/18+10/21 8/18+30/21 8/54+10/21 8/18+10/63 40/18+10/21 8/18+50/21 8/90+10/21 56/18+10/21 8/18+70/21