Answers

Subtract 5/84 from 40/21

1^st number: 1 19/21, 2^nd number: 5/84

40/21 - 5/84 is 155/84.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 84 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   40/21 = 40 × 4/21 × 4 = 160/84
3. Likewise, for the 2nd fraction, since 84 × 1 = 84,
   5/84 = 5 × 1/84 × 1 = 5/84
4. Subtract the two like fractions:
   160/84 - 5/84 = 160 - 5/84 = 155/84
5. In mixed form: 171/84

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