Answers

Subtract 90/4 from 42/90

1^st number: 42/90, 2^nd number: 22 2/4

42/90 - 90/4 is -661/30.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 4 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 90 × 2 = 180,
   42/90 = 42 × 2/90 × 2 = 84/180
3. Likewise, for the 2nd fraction, since 4 × 45 = 180,
   90/4 = 90 × 45/4 × 45 = 4050/180
4. Subtract the two like fractions:
   84/180 - 4050/180 = 84 - 4050/180 = -3966/180
5. After reducing the fraction, the answer is -661/30

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