Answers

Add 90/84 and 81/8

1^st number: 1 6/84, 2^nd number: 10 1/8

90/84 + 81/8 is 627/56.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 8 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 84 × 2 = 168,
   90/84 = 90 × 2/84 × 2 = 180/168
3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
   81/8 = 81 × 21/8 × 21 = 1701/168
4. Add the two like fractions:
   180/168 + 1701/168 = 180 + 1701/168 = 1881/168
5. 1881/168 simplified gives 627/56
6. So, 90/84 + 81/8 = 627/56
   In mixed form: 1111/56

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