Answers

Subtract 28/27 from 5/21

1^st number: 5/21, 2^nd number: 1 1/27

5/21 - 28/27 is -151/189.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 27 is 189
   
   Next, find the equivalent fraction of both fractional numbers with denominator 189
2. For the 1st fraction, since 21 × 9 = 189,
   5/21 = 5 × 9/21 × 9 = 45/189
3. Likewise, for the 2nd fraction, since 27 × 7 = 189,
   28/27 = 28 × 7/27 × 7 = 196/189
4. Subtract the two like fractions:
   45/189 - 196/189 = 45 - 196/189 = -151/189

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