Answers

Subtract 40/21 from 42/5

1^st number: 8 2/5, 2^nd number: 1 19/21

42/5 - 40/21 is 682/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 21 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 5 × 21 = 105,
   42/5 = 42 × 21/5 × 21 = 882/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   40/21 = 40 × 5/21 × 5 = 200/105
4. Subtract the two like fractions:
   882/105 - 200/105 = 882 - 200/105 = 682/105
5. In mixed form: 652/105

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