Answers

Subtract 4/18 from 21/7

1^st number: 3 0/7, 2^nd number: 4/18

21/7 - 4/18 is 25/9.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 18 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 7 × 18 = 126,
   21/7 = 21 × 18/7 × 18 = 378/126
3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
   4/18 = 4 × 7/18 × 7 = 28/126
4. Subtract the two like fractions:
   378/126 - 28/126 = 378 - 28/126 = 350/126
5. After reducing the fraction, the answer is 25/9
6. In mixed form: 27/9

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