Add 18/21 and 1/8
18/21 + 1/8 is 55/56.
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,
18/21 = 18 × 8/21 × 8 = 144/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
1/8 = 1 × 21/8 × 21 = 21/168 - Add the two like fractions:
144/168 + 21/168 = 144 + 21/168 = 165/168 - 165/168 simplified gives 55/56
- So, 18/21 + 1/8 = 55/56
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