Add 3/7 and 21/63
3/7 + 21/63 is 16/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
3/7 = 3 × 9/7 × 9 = 27/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
21/63 = 21 × 1/63 × 1 = 21/63 - Add the two like fractions:
27/63 + 21/63 = 27 + 21/63 = 48/63 - 48/63 simplified gives 16/21
- So, 3/7 + 21/63 = 16/21
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