Answers

Add 21/28 and 60/45

1^st number: 21/28, 2^nd number: 1 15/45

21/28 + 60/45 is 25/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 45 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 28 × 45 = 1260,
   21/28 = 21 × 45/28 × 45 = 945/1260
3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
   60/45 = 60 × 28/45 × 28 = 1680/1260
4. Add the two like fractions:
   945/1260 + 1680/1260 = 945 + 1680/1260 = 2625/1260
5. 2625/1260 simplified gives 25/12
6. So, 21/28 + 60/45 = 25/12
   In mixed form: 21/12

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