Answers

Subtract 63/9 from 45/80

1^st number: 45/80, 2^nd number: 7 0/9

45/80 - 63/9 is -103/16.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 9 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 80 × 9 = 720,
   45/80 = 45 × 9/80 × 9 = 405/720
3. Likewise, for the 2nd fraction, since 9 × 80 = 720,
   63/9 = 63 × 80/9 × 80 = 5040/720
4. Subtract the two like fractions:
   405/720 - 5040/720 = 405 - 5040/720 = -4635/720
5. After reducing the fraction, the answer is -103/16

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