Add 3/8 and 20/21
3/8 + 20/21 is 223/168.
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,
3/8 = 3 × 21/8 × 21 = 63/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
20/21 = 20 × 8/21 × 8 = 160/168 - Add the two like fractions:
63/168 + 160/168 = 63 + 160/168 = 223/168 - So, 3/8 + 20/21 = 223/168
In mixed form: 155/168
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