Add 4/8 and 18/21
4/8 + 18/21 is 19/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
4/8 = 4 × 21/8 × 21 = 84/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
18/21 = 18 × 8/21 × 8 = 144/168 - Add the two like fractions:
84/168 + 144/168 = 84 + 144/168 = 228/168 - 228/168 simplified gives 19/14
- So, 4/8 + 18/21 = 19/14
In mixed form: 15/14
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