Answers

Subtract 4/21 from 81/25

1^st number: 3 6/25, 2^nd number: 4/21

81/25 - 4/21 is 1601/525.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 21 is 525
   
   Next, find the equivalent fraction of both fractional numbers with denominator 525
2. For the 1st fraction, since 25 × 21 = 525,
   81/25 = 81 × 21/25 × 21 = 1701/525
3. Likewise, for the 2nd fraction, since 21 × 25 = 525,
   4/21 = 4 × 25/21 × 25 = 100/525
4. Subtract the two like fractions:
   1701/525 - 100/525 = 1701 - 100/525 = 1601/525
5. In mixed form: 326/525

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