Answers

Add 42/56 and 84/21

1^st number: 42/56, 2^nd number: 4 0/21

42/56 + 84/21 is 19/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 21 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 56 × 3 = 168,
   42/56 = 42 × 3/56 × 3 = 126/168
3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
   84/21 = 84 × 8/21 × 8 = 672/168
4. Add the two like fractions:
   126/168 + 672/168 = 126 + 672/168 = 798/168
5. 798/168 simplified gives 19/4
6. So, 42/56 + 84/21 = 19/4
   In mixed form: 43/4

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