Add 9/21 and 15/63
9/21 + 15/63 is 2/3.
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,
9/21 = 9 × 3/21 × 3 = 27/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
15/63 = 15 × 1/63 × 1 = 15/63 - Add the two like fractions:
27/63 + 15/63 = 27 + 15/63 = 42/63 - 42/63 simplified gives 2/3
- So, 9/21 + 15/63 = 2/3
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