Answers

Subtract 28/20 from 49/40

1^st number: 1 9/40, 2^nd number: 1 8/20

49/40 - 28/20 is -7/40.

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,
   49/40 = 49 × 1/40 × 1 = 49/40
3. Likewise, for the 2nd fraction, since 20 × 2 = 40,
   28/20 = 28 × 2/20 × 2 = 56/40
4. Subtract the two like fractions:
   49/40 - 56/40 = 49 - 56/40 = -7/40

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