Answers

Add 21/60 and 75/63

1^st number: 21/60, 2^nd number: 1 12/63

21/60 + 75/63 is 647/420.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 63 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 60 × 21 = 1260,
   21/60 = 21 × 21/60 × 21 = 441/1260
3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
   75/63 = 75 × 20/63 × 20 = 1500/1260
4. Add the two like fractions:
   441/1260 + 1500/1260 = 441 + 1500/1260 = 1941/1260
5. 1941/1260 simplified gives 647/420
6. So, 21/60 + 75/63 = 647/420
   In mixed form: 1227/420

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