Answers

Subtract 28/20 from 1/40

1^st number: 1/40, 2^nd number: 1 8/20

1/40 - 28/20 is -11/8.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 20 is 40
   
   Next, find the equivalent fraction of both fractional numbers with denominator 40
2. For the 1st fraction, since 40 × 1 = 40,
   1/40 = 1 × 1/40 × 1 = 1/40
3. Likewise, for the 2nd fraction, since 20 × 2 = 40,
   28/20 = 28 × 2/20 × 2 = 56/40
4. Subtract the two like fractions:
   1/40 - 56/40 = 1 - 56/40 = -55/40
5. After reducing the fraction, the answer is -11/8

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