Answers

Subtract 81/25 from 1/80

1^st number: 1/80, 2^nd number: 3 6/25

1/80 - 81/25 is -1291/400.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 25 is 400
   
   Next, find the equivalent fraction of both fractional numbers with denominator 400
2. For the 1st fraction, since 80 × 5 = 400,
   1/80 = 1 × 5/80 × 5 = 5/400
3. Likewise, for the 2nd fraction, since 25 × 16 = 400,
   81/25 = 81 × 16/25 × 16 = 1296/400
4. Subtract the two like fractions:
   5/400 - 1296/400 = 5 - 1296/400 = -1291/400

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