Answers

Subtract 42/10 from 7/40

1^st number: 7/40, 2^nd number: 4 2/10

7/40 - 42/10 is -161/40.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 10 is 40
   
   Next, find the equivalent fraction of both fractional numbers with denominator 40
2. For the 1st fraction, since 40 × 1 = 40,
   7/40 = 7 × 1/40 × 1 = 7/40
3. Likewise, for the 2nd fraction, since 10 × 4 = 40,
   42/10 = 42 × 4/10 × 4 = 168/40
4. Subtract the two like fractions:
   7/40 - 168/40 = 7 - 168/40 = -161/40

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