Answers

Subtract 45/63 from 81/20

1^st number: 4 1/20, 2^nd number: 45/63

81/20 - 45/63 is 467/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 63 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 20 × 63 = 1260,
   81/20 = 81 × 63/20 × 63 = 5103/1260
3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
   45/63 = 45 × 20/63 × 20 = 900/1260
4. Subtract the two like fractions:
   5103/1260 - 900/1260 = 5103 - 900/1260 = 4203/1260
5. After reducing the fraction, the answer is 467/140
6. In mixed form: 347/140

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