Answers

Subtract 50/21 from 9/72

1^st number: 9/72, 2^nd number: 2 8/21

9/72 - 50/21 is -379/168.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 21 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   9/72 = 9 × 7/72 × 7 = 63/504
3. Likewise, for the 2nd fraction, since 21 × 24 = 504,
   50/21 = 50 × 24/21 × 24 = 1200/504
4. Subtract the two like fractions:
   63/504 - 1200/504 = 63 - 1200/504 = -1137/504
5. After reducing the fraction, the answer is -379/168

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