Answers

Subtract 42/25 from 40/84

1^st number: 40/84, 2^nd number: 1 17/25

40/84 - 42/25 is -632/525.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 25 is 2100
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2100
2. For the 1st fraction, since 84 × 25 = 2100,
   40/84 = 40 × 25/84 × 25 = 1000/2100
3. Likewise, for the 2nd fraction, since 25 × 84 = 2100,
   42/25 = 42 × 84/25 × 84 = 3528/2100
4. Subtract the two like fractions:
   1000/2100 - 3528/2100 = 1000 - 3528/2100 = -2528/2100
5. After reducing the fraction, the answer is -632/525

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