Add 1/8 and 20/21
1/8 + 20/21 is 181/168.
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,
1/8 = 1 × 21/8 × 21 = 21/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
20/21 = 20 × 8/21 × 8 = 160/168 - Add the two like fractions:
21/168 + 160/168 = 21 + 160/168 = 181/168 - So, 1/8 + 20/21 = 181/168
In mixed form: 113/168
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