Answers

Subtract 18/4 from 21/9

1^st number: 2 3/9, 2^nd number: 4 2/4

21/9 - 18/4 is -13/6.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 4 is 36
   
   Next, find the equivalent fraction of both fractional numbers with denominator 36
2. For the 1st fraction, since 9 × 4 = 36,
   21/9 = 21 × 4/9 × 4 = 84/36
3. Likewise, for the 2nd fraction, since 4 × 9 = 36,
   18/4 = 18 × 9/4 × 9 = 162/36
4. Subtract the two like fractions:
   84/36 - 162/36 = 84 - 162/36 = -78/36
5. After reducing the fraction, the answer is -13/6

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