Answers

Add 63/42 and 45/40

1^st number: 1 21/42, 2^nd number: 1 5/40

63/42 + 45/40 is 21/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 42 × 20 = 840,
   63/42 = 63 × 20/42 × 20 = 1260/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   45/40 = 45 × 21/40 × 21 = 945/840
4. Add the two like fractions:
   1260/840 + 945/840 = 1260 + 945/840 = 2205/840
5. 2205/840 simplified gives 21/8
6. So, 63/42 + 45/40 = 21/8
   In mixed form: 25/8

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