Answers

Subtract 40/21 from 40/27

1^st number: 1 13/27, 2^nd number: 1 19/21

40/27 - 40/21 is -80/189.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 21 is 189
   
   Next, find the equivalent fraction of both fractional numbers with denominator 189
2. For the 1st fraction, since 27 × 7 = 189,
   40/27 = 40 × 7/27 × 7 = 280/189
3. Likewise, for the 2nd fraction, since 21 × 9 = 189,
   40/21 = 40 × 9/21 × 9 = 360/189
4. Subtract the two like fractions:
   280/189 - 360/189 = 280 - 360/189 = -80/189

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