Answers

Add 81/20 and 45/84

1^st number: 4 1/20, 2^nd number: 45/84

81/20 + 45/84 is 321/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   81/20 = 81 × 21/20 × 21 = 1701/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   45/84 = 45 × 5/84 × 5 = 225/420
4. Add the two like fractions:
   1701/420 + 225/420 = 1701 + 225/420 = 1926/420
5. 1926/420 simplified gives 321/70
6. So, 81/20 + 45/84 = 321/70
   In mixed form: 441/70

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