Add 12/63 and 9/21
12/63 + 9/21 is 13/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
12/63 = 12 × 1/63 × 1 = 12/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
9/21 = 9 × 3/21 × 3 = 27/63 - Add the two like fractions:
12/63 + 27/63 = 12 + 27/63 = 39/63 - 39/63 simplified gives 13/21
- So, 12/63 + 9/21 = 13/21
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