Answers

Subtract 9/84 from 27/80

27/80 - 9/84 is 129/560.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 84 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 80 × 21 = 1680,
   27/80 = 27 × 21/80 × 21 = 567/1680
3. Likewise, for the 2nd fraction, since 84 × 20 = 1680,
   9/84 = 9 × 20/84 × 20 = 180/1680
4. Subtract the two like fractions:
   567/1680 - 180/1680 = 567 - 180/1680 = 387/1680
5. After reducing the fraction, the answer is 129/560

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