Add 49/10 and 81/21
1st number: 4 9/10, 2nd number: 3 18/21
49/10 + 81/21 is 613/70.
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,
49/10 = 49 × 21/10 × 21 = 1029/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
81/21 = 81 × 10/21 × 10 = 810/210 - Add the two like fractions:
1029/210 + 810/210 = 1029 + 810/210 = 1839/210 - 1839/210 simplified gives 613/70
- So, 49/10 + 81/21 = 613/70
In mixed form: 853/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/10+81/21 49/20+81/21 49/10+81/42 49/30+81/21 49/10+81/63 49/50+81/21 49/70+81/21