Answers

Subtract 90/80 from 1/75

1^st number: 1/75, 2^nd number: 1 10/80

1/75 - 90/80 is -667/600.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 80 is 1200
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1200
2. For the 1st fraction, since 75 × 16 = 1200,
   1/75 = 1 × 16/75 × 16 = 16/1200
3. Likewise, for the 2nd fraction, since 80 × 15 = 1200,
   90/80 = 90 × 15/80 × 15 = 1350/1200
4. Subtract the two like fractions:
   16/1200 - 1350/1200 = 16 - 1350/1200 = -1334/1200
5. After reducing the fraction, the answer is -667/600

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