Answers

Subtract 7/80 from 1/81

1/81 - 7/80 is -487/6480.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 80 is 6480
   
   Next, find the equivalent fraction of both fractional numbers with denominator 6480
2. For the 1st fraction, since 81 × 80 = 6480,
   1/81 = 1 × 80/81 × 80 = 80/6480
3. Likewise, for the 2nd fraction, since 80 × 81 = 6480,
   7/80 = 7 × 81/80 × 81 = 567/6480
4. Subtract the two like fractions:
   80/6480 - 567/6480 = 80 - 567/6480 = -487/6480

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