Answers

Subtract 40/21 from 6/15

1^st number: 6/15, 2^nd number: 1 19/21

6/15 - 40/21 is -158/105.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 21 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 15 × 7 = 105,
   6/15 = 6 × 7/15 × 7 = 42/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   40/21 = 40 × 5/21 × 5 = 200/105
4. Subtract the two like fractions:
   42/105 - 200/105 = 42 - 200/105 = -158/105

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