Answers

Subtract 45/25 from 54/72

1^st number: 54/72, 2^nd number: 1 20/25

54/72 - 45/25 is -21/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 25 is 1800
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1800
2. For the 1st fraction, since 72 × 25 = 1800,
   54/72 = 54 × 25/72 × 25 = 1350/1800
3. Likewise, for the 2nd fraction, since 25 × 72 = 1800,
   45/25 = 45 × 72/25 × 72 = 3240/1800
4. Subtract the two like fractions:
   1350/1800 - 3240/1800 = 1350 - 3240/1800 = -1890/1800
5. After reducing the fraction, the answer is -21/20

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