Answers

Subtract 9/70 from 5/81

5/81 - 9/70 is -379/5670.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 70 is 5670
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5670
2. For the 1st fraction, since 81 × 70 = 5670,
   5/81 = 5 × 70/81 × 70 = 350/5670
3. Likewise, for the 2nd fraction, since 70 × 81 = 5670,
   9/70 = 9 × 81/70 × 81 = 729/5670
4. Subtract the two like fractions:
   350/5670 - 729/5670 = 350 - 729/5670 = -379/5670

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