Answers

Add 4/20 and 81/64

1^st number: 4/20, 2^nd number: 1 17/64

4/20 + 81/64 is 469/320.

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,
   4/20 = 4 × 16/20 × 16 = 64/320
3. Likewise, for the 2nd fraction, since 64 × 5 = 320,
   81/64 = 81 × 5/64 × 5 = 405/320
4. Add the two like fractions:
   64/320 + 405/320 = 64 + 405/320 = 469/320
5. So, 4/20 + 81/64 = 469/320
   In mixed form: 1149/320

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