Answers

Subtract 42/27 from 84/64

1^st number: 1 20/64, 2^nd number: 1 15/27

84/64 - 42/27 is -35/144.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 27 is 1728
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1728
2. For the 1st fraction, since 64 × 27 = 1728,
   84/64 = 84 × 27/64 × 27 = 2268/1728
3. Likewise, for the 2nd fraction, since 27 × 64 = 1728,
   42/27 = 42 × 64/27 × 64 = 2688/1728
4. Subtract the two like fractions:
   2268/1728 - 2688/1728 = 2268 - 2688/1728 = -420/1728
5. After reducing the fraction, the answer is -35/144

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