Answers

Subtract 21/54 from 45/75

45/75 - 21/54 is 19/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 54 is 1350
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1350
2. For the 1st fraction, since 75 × 18 = 1350,
   45/75 = 45 × 18/75 × 18 = 810/1350
3. Likewise, for the 2nd fraction, since 54 × 25 = 1350,
   21/54 = 21 × 25/54 × 25 = 525/1350
4. Subtract the two like fractions:
   810/1350 - 525/1350 = 810 - 525/1350 = 285/1350
5. After reducing the fraction, the answer is 19/90

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