Answers

Subtract 48/84 from 21/72

21/72 - 48/84 is -47/168.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 84 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   21/72 = 21 × 7/72 × 7 = 147/504
3. Likewise, for the 2nd fraction, since 84 × 6 = 504,
   48/84 = 48 × 6/84 × 6 = 288/504
4. Subtract the two like fractions:
   147/504 - 288/504 = 147 - 288/504 = -141/504
5. After reducing the fraction, the answer is -47/168

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