Answers

Subtract 40/21 from 10/15

1^st number: 10/15, 2^nd number: 1 19/21

10/15 - 40/21 is -26/21.

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,
   10/15 = 10 × 7/15 × 7 = 70/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   40/21 = 40 × 5/21 × 5 = 200/105
4. Subtract the two like fractions:
   70/105 - 200/105 = 70 - 200/105 = -130/105
5. After reducing the fraction, the answer is -26/21

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