Answers

Subtract 36/40 from 30/84

30/84 - 36/40 is -19/35.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 84 × 10 = 840,
   30/84 = 30 × 10/84 × 10 = 300/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   36/40 = 36 × 21/40 × 21 = 756/840
4. Subtract the two like fractions:
   300/840 - 756/840 = 300 - 756/840 = -456/840
5. After reducing the fraction, the answer is -19/35

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