Answers

Subtract 5/81 from 7/30

7/30 - 5/81 is 139/810.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 81 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 30 × 27 = 810,
   7/30 = 7 × 27/30 × 27 = 189/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   5/81 = 5 × 10/81 × 10 = 50/810
4. Subtract the two like fractions:
   189/810 - 50/810 = 189 - 50/810 = 139/810

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