Answers

Add 21/63 and 4/30

21/63 + 4/30 is 7/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 30 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 63 × 10 = 630,
   21/63 = 21 × 10/63 × 10 = 210/630
3. Likewise, for the 2nd fraction, since 30 × 21 = 630,
   4/30 = 4 × 21/30 × 21 = 84/630
4. Add the two like fractions:
   210/630 + 84/630 = 210 + 84/630 = 294/630
5. 294/630 simplified gives 7/15
6. So, 21/63 + 4/30 = 7/15

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