Answers

Add 42/63 and 25/21

1^st number: 42/63, 2^nd number: 1 4/21

42/63 + 25/21 is 13/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 21 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 63 × 1 = 63,
   42/63 = 42 × 1/63 × 1 = 42/63
3. Likewise, for the 2nd fraction, since 21 × 3 = 63,
   25/21 = 25 × 3/21 × 3 = 75/63
4. Add the two like fractions:
   42/63 + 75/63 = 42 + 75/63 = 117/63
5. 117/63 simplified gives 13/7
6. So, 42/63 + 25/21 = 13/7
   In mixed form: 16/7

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