Add 8/2 and 81/21
1st number: 4 0/2, 2nd number: 3 18/21
8/2 + 81/21 is 55/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
8/2 = 8 × 21/2 × 21 = 168/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
81/21 = 81 × 2/21 × 2 = 162/42 - Add the two like fractions:
168/42 + 162/42 = 168 + 162/42 = 330/42 - 330/42 simplified gives 55/7
- So, 8/2 + 81/21 = 55/7
In mixed form: 76/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/2+81/21 8/4+81/21 8/2+81/42 24/2+81/21 8/6+81/21 8/2+81/63 40/2+81/21 8/10+81/21 56/2+81/21 8/14+81/21