Answers

Subtract 42/30 from 1/84

1^st number: 1/84, 2^nd number: 1 12/30

1/84 - 42/30 is -583/420.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 30 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   1/84 = 1 × 5/84 × 5 = 5/420
3. Likewise, for the 2nd fraction, since 30 × 14 = 420,
   42/30 = 42 × 14/30 × 14 = 588/420
4. Subtract the two like fractions:
   5/420 - 588/420 = 5 - 588/420 = -583/420

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