Add 8/20 and 27/42
8/20 + 27/42 is 73/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
8/20 = 8 × 21/20 × 21 = 168/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
27/42 = 27 × 10/42 × 10 = 270/420 - Add the two like fractions:
168/420 + 270/420 = 168 + 270/420 = 438/420 - 438/420 simplified gives 73/70
- So, 8/20 + 27/42 = 73/70
In mixed form: 13/70
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