Answers

Subtract 90/48 from 12/45

1^st number: 12/45, 2^nd number: 1 42/48

12/45 - 90/48 is -193/120.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 48 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 45 × 16 = 720,
   12/45 = 12 × 16/45 × 16 = 192/720
3. Likewise, for the 2nd fraction, since 48 × 15 = 720,
   90/48 = 90 × 15/48 × 15 = 1350/720
4. Subtract the two like fractions:
   192/720 - 1350/720 = 192 - 1350/720 = -1158/720
5. After reducing the fraction, the answer is -193/120

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