Add 8/10 and 4/21
8/10 + 4/21 is 104/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
8/10 = 8 × 21/10 × 21 = 168/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
4/21 = 4 × 10/21 × 10 = 40/210 - Add the two like fractions:
168/210 + 40/210 = 168 + 40/210 = 208/210 - 208/210 simplified gives 104/105
- So, 8/10 + 4/21 = 104/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10+4/21 8/10+8/21 8/20+4/21 8/10+4/42 24/10+4/21 8/10+12/21 8/30+4/21 8/10+4/63 40/10+4/21 8/10+20/21 8/50+4/21 56/10+4/21 8/10+28/21 8/70+4/21