Add 21/40 and 12/80
21/40 + 12/80 is 27/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
21/40 = 21 × 2/40 × 2 = 42/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
12/80 = 12 × 1/80 × 1 = 12/80 - Add the two like fractions:
42/80 + 12/80 = 42 + 12/80 = 54/80 - 54/80 simplified gives 27/40
- So, 21/40 + 12/80 = 27/40
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