Answers

Subtract 90/4 from 3/21

1^st number: 3/21, 2^nd number: 22 2/4

3/21 - 90/4 is -313/14.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 4 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   3/21 = 3 × 4/21 × 4 = 12/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   90/4 = 90 × 21/4 × 21 = 1890/84
4. Subtract the two like fractions:
   12/84 - 1890/84 = 12 - 1890/84 = -1878/84
5. After reducing the fraction, the answer is -313/14

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