Answers

Subtract 90/63 from 54/80

1^st number: 54/80, 2^nd number: 1 27/63

54/80 - 90/63 is -211/280.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 63 is 5040
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5040
2. For the 1st fraction, since 80 × 63 = 5040,
   54/80 = 54 × 63/80 × 63 = 3402/5040
3. Likewise, for the 2nd fraction, since 63 × 80 = 5040,
   90/63 = 90 × 80/63 × 80 = 7200/5040
4. Subtract the two like fractions:
   3402/5040 - 7200/5040 = 3402 - 7200/5040 = -3798/5040
5. After reducing the fraction, the answer is -211/280

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