Answers

Subtract 90/30 from 42/75

1^st number: 42/75, 2^nd number: 3 0/30

42/75 - 90/30 is -61/25.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 30 is 150
   
   Next, find the equivalent fraction of both fractional numbers with denominator 150
2. For the 1st fraction, since 75 × 2 = 150,
   42/75 = 42 × 2/75 × 2 = 84/150
3. Likewise, for the 2nd fraction, since 30 × 5 = 150,
   90/30 = 90 × 5/30 × 5 = 450/150
4. Subtract the two like fractions:
   84/150 - 450/150 = 84 - 450/150 = -366/150
5. After reducing the fraction, the answer is -61/25

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