Answers

Subtract 50/21 from 7/18

1^st number: 7/18, 2^nd number: 2 8/21

7/18 - 50/21 is -251/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 21 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   7/18 = 7 × 7/18 × 7 = 49/126
3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
   50/21 = 50 × 6/21 × 6 = 300/126
4. Subtract the two like fractions:
   49/126 - 300/126 = 49 - 300/126 = -251/126

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