Answers

Subtract 42/16 from 10/40

1^st number: 10/40, 2^nd number: 2 10/16

10/40 - 42/16 is -19/8.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 16 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 40 × 2 = 80,
   10/40 = 10 × 2/40 × 2 = 20/80
3. Likewise, for the 2nd fraction, since 16 × 5 = 80,
   42/16 = 42 × 5/16 × 5 = 210/80
4. Subtract the two like fractions:
   20/80 - 210/80 = 20 - 210/80 = -190/80
5. After reducing the fraction, the answer is -19/8

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