Answers

Subtract 12/5 from 7/81

1^st number: 7/81, 2^nd number: 2 2/5

7/81 - 12/5 is -937/405.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 5 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 81 × 5 = 405,
   7/81 = 7 × 5/81 × 5 = 35/405
3. Likewise, for the 2nd fraction, since 5 × 81 = 405,
   12/5 = 12 × 81/5 × 81 = 972/405
4. Subtract the two like fractions:
   35/405 - 972/405 = 35 - 972/405 = -937/405

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