Answers

Subtract 45/90 from 3/80

3/80 - 45/90 is -37/80.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 90 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 80 × 9 = 720,
   3/80 = 3 × 9/80 × 9 = 27/720
3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
   45/90 = 45 × 8/90 × 8 = 360/720
4. Subtract the two like fractions:
   27/720 - 360/720 = 27 - 360/720 = -333/720
5. After reducing the fraction, the answer is -37/80

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