Add 1/21 and 42/63
1/21 + 42/63 is 5/7.
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,
1/21 = 1 × 3/21 × 3 = 3/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
42/63 = 42 × 1/63 × 1 = 42/63 - Add the two like fractions:
3/63 + 42/63 = 3 + 42/63 = 45/63 - 45/63 simplified gives 5/7
- So, 1/21 + 42/63 = 5/7
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