Answers

Subtract 40/7 from 30/18

1^st number: 1 12/18, 2^nd number: 5 5/7

30/18 - 40/7 is -85/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 7 is 126
   
   Next, find the equivalent fraction of both fractional numbers with denominator 126
2. For the 1st fraction, since 18 × 7 = 126,
   30/18 = 30 × 7/18 × 7 = 210/126
3. Likewise, for the 2nd fraction, since 7 × 18 = 126,
   40/7 = 40 × 18/7 × 18 = 720/126
4. Subtract the two like fractions:
   210/126 - 720/126 = 210 - 720/126 = -510/126
5. After reducing the fraction, the answer is -85/21

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