Answers

Add 21/63 and 60/40

1^st number: 21/63, 2^nd number: 1 20/40

21/63 + 60/40 is 11/6.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 40 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 63 × 40 = 2520,
   21/63 = 21 × 40/63 × 40 = 840/2520
3. Likewise, for the 2nd fraction, since 40 × 63 = 2520,
   60/40 = 60 × 63/40 × 63 = 3780/2520
4. Add the two like fractions:
   840/2520 + 3780/2520 = 840 + 3780/2520 = 4620/2520
5. 4620/2520 simplified gives 11/6
6. So, 21/63 + 60/40 = 11/6
   In mixed form: 15/6

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