Answers

Subtract 2/21 from 7/84

7/84 - 2/21 is -1/84.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 84 × 1 = 84,
   7/84 = 7 × 1/84 × 1 = 7/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   2/21 = 2 × 4/21 × 4 = 8/84
4. Subtract the two like fractions:
   7/84 - 8/84 = 7 - 8/84 = -1/84

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