Add 21/30 and 20/63
21/30 + 20/63 is 641/630.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
21/30 = 21 × 21/30 × 21 = 441/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
20/63 = 20 × 10/63 × 10 = 200/630 - Add the two like fractions:
441/630 + 200/630 = 441 + 200/630 = 641/630 - So, 21/30 + 20/63 = 641/630
In mixed form: 111/630
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