Answers

Add 28/84 and 63/60

1^st number: 28/84, 2^nd number: 1 3/60

28/84 + 63/60 is 83/60.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   28/84 = 28 × 5/84 × 5 = 140/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   63/60 = 63 × 7/60 × 7 = 441/420
4. Add the two like fractions:
   140/420 + 441/420 = 140 + 441/420 = 581/420
5. 581/420 simplified gives 83/60
6. So, 28/84 + 63/60 = 83/60
   In mixed form: 123/60

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