Add 2/8 and 10/21
2/8 + 10/21 is 61/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
2/8 = 2 × 21/8 × 21 = 42/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
10/21 = 10 × 8/21 × 8 = 80/168 - Add the two like fractions:
42/168 + 80/168 = 42 + 80/168 = 122/168 - 122/168 simplified gives 61/84
- So, 2/8 + 10/21 = 61/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8+10/21 2/8+20/21 2/16+10/21 2/8+10/42 6/8+10/21 2/8+30/21 2/24+10/21 2/8+10/63 10/8+10/21 2/8+50/21 2/40+10/21 14/8+10/21 2/8+70/21 2/56+10/21