Answers

Subtract 15/40 from 50/21

1^st number: 2 8/21, 2^nd number: 15/40

50/21 - 15/40 is 337/168.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 21 × 40 = 840,
   50/21 = 50 × 40/21 × 40 = 2000/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   15/40 = 15 × 21/40 × 21 = 315/840
4. Subtract the two like fractions:
   2000/840 - 315/840 = 2000 - 315/840 = 1685/840
5. After reducing the fraction, the answer is 337/168
6. In mixed form: 21/168

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