Answers

Add 3/84 and 40/20

1^st number: 3/84, 2^nd number: 2 0/20

3/84 + 40/20 is 57/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   3/84 = 3 × 5/84 × 5 = 15/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   40/20 = 40 × 21/20 × 21 = 840/420
4. Add the two like fractions:
   15/420 + 840/420 = 15 + 840/420 = 855/420
5. 855/420 simplified gives 57/28
6. So, 3/84 + 40/20 = 57/28
   In mixed form: 21/28

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