Answers

Subtract 60/42 from 30/40

1^st number: 30/40, 2^nd number: 1 18/42

30/40 - 60/42 is -19/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 42 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 40 × 21 = 840,
   30/40 = 30 × 21/40 × 21 = 630/840
3. Likewise, for the 2nd fraction, since 42 × 20 = 840,
   60/42 = 60 × 20/42 × 20 = 1200/840
4. Subtract the two like fractions:
   630/840 - 1200/840 = 630 - 1200/840 = -570/840
5. After reducing the fraction, the answer is -19/28

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