Answers

Subtract 7/18 from 45/21

1^st number: 2 3/21, 2^nd number: 7/18

45/21 - 7/18 is 221/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 18 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 21 × 6 = 126,
   45/21 = 45 × 6/21 × 6 = 270/126
3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
   7/18 = 7 × 7/18 × 7 = 49/126
4. Subtract the two like fractions:
   270/126 - 49/126 = 270 - 49/126 = 221/126
5. In mixed form: 195/126

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