Answers

Subtract 40/5 from 30/4

1^st number: 7 2/4, 2^nd number: 8 0/5

30/4 - 40/5 is -1/2.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 5 is 20
   
   Next, find the equivalent fraction of both fractional numbers with denominator 20
2. For the 1st fraction, since 4 × 5 = 20,
   30/4 = 30 × 5/4 × 5 = 150/20
3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
   40/5 = 40 × 4/5 × 4 = 160/20
4. Subtract the two like fractions:
   150/20 - 160/20 = 150 - 160/20 = -10/20
5. After reducing the fraction, the answer is -1/2

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