Answers

Add 90/56 and 18/21

1^st number: 1 34/56, 2^nd number: 18/21

90/56 + 18/21 is 69/28.

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,
   90/56 = 90 × 3/56 × 3 = 270/168
3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
   18/21 = 18 × 8/21 × 8 = 144/168
4. Add the two like fractions:
   270/168 + 144/168 = 270 + 144/168 = 414/168
5. 414/168 simplified gives 69/28
6. So, 90/56 + 18/21 = 69/28
   In mixed form: 213/28

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