Add 4/7 and 21/63
4/7 + 21/63 is 19/21.
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,
4/7 = 4 × 9/7 × 9 = 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, 4/7 + 21/63 = 19/21
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