Answers

Subtract 3/84 from 2/20

2/20 - 3/84 is 9/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   2/20 = 2 × 21/20 × 21 = 42/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   3/84 = 3 × 5/84 × 5 = 15/420
4. Subtract the two like fractions:
   42/420 - 15/420 = 42 - 15/420 = 27/420
5. After reducing the fraction, the answer is 9/140

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