Answers

Subtract 63/20 from 54/84

1^st number: 54/84, 2^nd number: 3 3/20

54/84 - 63/20 is -351/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   54/84 = 54 × 5/84 × 5 = 270/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   63/20 = 63 × 21/20 × 21 = 1323/420
4. Subtract the two like fractions:
   270/420 - 1323/420 = 270 - 1323/420 = -1053/420
5. After reducing the fraction, the answer is -351/140

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