Add 5/10 and 1/21
5/10 + 1/21 is 23/42.
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,
5/10 = 5 × 21/10 × 21 = 105/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
1/21 = 1 × 10/21 × 10 = 10/210 - Add the two like fractions:
105/210 + 10/210 = 105 + 10/210 = 115/210 - 115/210 simplified gives 23/42
- So, 5/10 + 1/21 = 23/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 5/10+2/21 5/20+1/21 5/10+1/42 15/10+1/21 5/10+3/21 5/30+1/21 5/10+1/63 25/10+1/21 5/10+5/21 5/50+1/21 35/10+1/21 5/10+7/21 5/70+1/21