Answers

Subtract 40/49 from 21/84

21/84 - 40/49 is -111/196.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 49 is 588
   
   Next, find the equivalent fraction of both fractional numbers with denominator 588
2. For the 1st fraction, since 84 × 7 = 588,
   21/84 = 21 × 7/84 × 7 = 147/588
3. Likewise, for the 2nd fraction, since 49 × 12 = 588,
   40/49 = 40 × 12/49 × 12 = 480/588
4. Subtract the two like fractions:
   147/588 - 480/588 = 147 - 480/588 = -333/588
5. After reducing the fraction, the answer is -111/196

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