Add 4/21 and 18/9
1st number: 4/21, 2nd number: 2 0/9
4/21 + 18/9 is 46/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
4/21 = 4 × 3/21 × 3 = 12/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
18/9 = 18 × 7/9 × 7 = 126/63 - Add the two like fractions:
12/63 + 126/63 = 12 + 126/63 = 138/63 - 138/63 simplified gives 46/21
- So, 4/21 + 18/9 = 46/21
In mixed form: 24/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+18/9 4/21+36/9 4/42+18/9 12/21+18/9 4/21+54/9 4/63+18/9 4/21+18/27 20/21+18/9 4/21+90/9 4/21+18/45 28/21+18/9 4/21+18/63