Answers

Subtract 75/30 from 20/42

1^st number: 20/42, 2^nd number: 2 15/30

20/42 - 75/30 is -85/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 30 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 42 × 5 = 210,
   20/42 = 20 × 5/42 × 5 = 100/210
3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
   75/30 = 75 × 7/30 × 7 = 525/210
4. Subtract the two like fractions:
   100/210 - 525/210 = 100 - 525/210 = -425/210
5. After reducing the fraction, the answer is -85/42

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