Answers

Subtract 49/90 from 9/80

9/80 - 49/90 is -311/720.

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,
   9/80 = 9 × 9/80 × 9 = 81/720
3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
   49/90 = 49 × 8/90 × 8 = 392/720
4. Subtract the two like fractions:
   81/720 - 392/720 = 81 - 392/720 = -311/720

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