Answers

Subtract 5/21 from 8/5

1^st number: 1 3/5, 2^nd number: 5/21

8/5 - 5/21 is 143/105.

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,
   8/5 = 8 × 21/5 × 21 = 168/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   5/21 = 5 × 5/21 × 5 = 25/105
4. Subtract the two like fractions:
   168/105 - 25/105 = 168 - 25/105 = 143/105
5. In mixed form: 138/105

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