Add 4/2 and 18/21
1st number: 2 0/2, 2nd number: 18/21
4/2 + 18/21 is 20/7.
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,
4/2 = 4 × 21/2 × 21 = 84/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
18/21 = 18 × 2/21 × 2 = 36/42 - Add the two like fractions:
84/42 + 36/42 = 84 + 36/42 = 120/42 - 120/42 simplified gives 20/7
- So, 4/2 + 18/21 = 20/7
In mixed form: 26/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/2+18/21 4/2+36/21 4/2+18/42 12/2+18/21 4/2+54/21 4/6+18/21 4/2+18/63 20/2+18/21 4/2+90/21 4/10+18/21 28/2+18/21 4/14+18/21