Answers

Add 90/20 and 42/64

1^st number: 4 10/20, 2^nd number: 42/64

90/20 + 42/64 is 165/32.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 64 is 320
   
   Next, find the equivalent fraction of both fractional numbers with denominator 320
2. For the 1st fraction, since 20 × 16 = 320,
   90/20 = 90 × 16/20 × 16 = 1440/320
3. Likewise, for the 2nd fraction, since 64 × 5 = 320,
   42/64 = 42 × 5/64 × 5 = 210/320
4. Add the two like fractions:
   1440/320 + 210/320 = 1440 + 210/320 = 1650/320
5. 1650/320 simplified gives 165/32
6. So, 90/20 + 42/64 = 165/32
   In mixed form: 55/32

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