Answers

Subtract 32/45 from 21/84

21/84 - 32/45 is -83/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 45 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 84 × 15 = 1260,
   21/84 = 21 × 15/84 × 15 = 315/1260
3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
   32/45 = 32 × 28/45 × 28 = 896/1260
4. Subtract the two like fractions:
   315/1260 - 896/1260 = 315 - 896/1260 = -581/1260
5. After reducing the fraction, the answer is -83/180

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