Answers

Subtract 81/64 from 20/12

1^st number: 1 8/12, 2^nd number: 1 17/64

20/12 - 81/64 is 77/192.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 64 is 192
   
   Next, find the equivalent fraction of both fractional numbers with denominator 192
2. For the 1st fraction, since 12 × 16 = 192,
   20/12 = 20 × 16/12 × 16 = 320/192
3. Likewise, for the 2nd fraction, since 64 × 3 = 192,
   81/64 = 81 × 3/64 × 3 = 243/192
4. Subtract the two like fractions:
   320/192 - 243/192 = 320 - 243/192 = 77/192

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