Add 12/21 and 21/63
12/21 + 21/63 is 19/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
12/21 = 12 × 3/21 × 3 = 36/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
21/63 = 21 × 1/63 × 1 = 21/63 - Add the two like fractions:
36/63 + 21/63 = 36 + 21/63 = 57/63 - 57/63 simplified gives 19/21
- So, 12/21 + 21/63 = 19/21
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