Answers

Add 15/84 and 40/20

1^st number: 15/84, 2^nd number: 2 0/20

15/84 + 40/20 is 61/28.

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,
   15/84 = 15 × 5/84 × 5 = 75/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   40/20 = 40 × 21/20 × 21 = 840/420
4. Add the two like fractions:
   75/420 + 840/420 = 75 + 840/420 = 915/420
5. 915/420 simplified gives 61/28
6. So, 15/84 + 40/20 = 61/28
   In mixed form: 25/28

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