Answers

Subtract 20/63 from 84/45

1^st number: 1 39/45, 2^nd number: 20/63

84/45 - 20/63 is 488/315.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 63 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 45 × 7 = 315,
   84/45 = 84 × 7/45 × 7 = 588/315
3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
   20/63 = 20 × 5/63 × 5 = 100/315
4. Subtract the two like fractions:
   588/315 - 100/315 = 588 - 100/315 = 488/315
5. In mixed form: 1173/315

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