Add 4/21 and 84/8
1st number: 4/21, 2nd number: 10 4/8
4/21 + 84/8 is 449/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
4/21 = 4 × 8/21 × 8 = 32/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
84/8 = 84 × 21/8 × 21 = 1764/168 - Add the two like fractions:
32/168 + 1764/168 = 32 + 1764/168 = 1796/168 - 1796/168 simplified gives 449/42
- So, 4/21 + 84/8 = 449/42
In mixed form: 1029/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+84/8 4/42+84/8 4/21+84/16 12/21+84/8 4/63+84/8 4/21+84/24 20/21+84/8 4/21+84/40 28/21+84/8 4/21+84/56