Answers

Subtract 20/5 from 84/21

1^st number: 4 0/21, 2^nd number: 4 0/5

84/21 - 20/5 is 0/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 5 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 21 × 5 = 105,
   84/21 = 84 × 5/21 × 5 = 420/105
3. Likewise, for the 2nd fraction, since 5 × 21 = 105,
   20/5 = 20 × 21/5 × 21 = 420/105
4. Subtract the two like fractions:
   420/105 - 420/105 = 420 - 420/105 = 0/105
5. The answer is 0

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