Answers

Subtract 90/42 from 84/4

1^st number: 21 0/4, 2^nd number: 2 6/42

84/4 - 90/42 is 132/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 42 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 4 × 21 = 84,
   84/4 = 84 × 21/4 × 21 = 1764/84
3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
   90/42 = 90 × 2/42 × 2 = 180/84
4. Subtract the two like fractions:
   1764/84 - 180/84 = 1764 - 180/84 = 1584/84
5. After reducing the fraction, the answer is 132/7
6. In mixed form: 186/7

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