Answers

Add 90/36 and 20/64

1^st number: 2 18/36, 2^nd number: 20/64

90/36 + 20/64 is 45/16.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 64 is 576
   
   Next, find the equivalent fraction of both fractional numbers with denominator 576
2. For the 1st fraction, since 36 × 16 = 576,
   90/36 = 90 × 16/36 × 16 = 1440/576
3. Likewise, for the 2nd fraction, since 64 × 9 = 576,
   20/64 = 20 × 9/64 × 9 = 180/576
4. Add the two like fractions:
   1440/576 + 180/576 = 1440 + 180/576 = 1620/576
5. 1620/576 simplified gives 45/16
6. So, 90/36 + 20/64 = 45/16
   In mixed form: 213/16

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