Answers

Subtract 70/45 from 54/21

1^st number: 2 12/21, 2^nd number: 1 25/45

54/21 - 70/45 is 64/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 45 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 21 × 15 = 315,
   54/21 = 54 × 15/21 × 15 = 810/315
3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
   70/45 = 70 × 7/45 × 7 = 490/315
4. Subtract the two like fractions:
   810/315 - 490/315 = 810 - 490/315 = 320/315
5. After reducing the fraction, the answer is 64/63
6. In mixed form: 11/63

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