Answers

Subtract 80/81 from 45/60

45/60 - 80/81 is -77/324.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 60 × 27 = 1620,
   45/60 = 45 × 27/60 × 27 = 1215/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   80/81 = 80 × 20/81 × 20 = 1600/1620
4. Subtract the two like fractions:
   1215/1620 - 1600/1620 = 1215 - 1600/1620 = -385/1620
5. After reducing the fraction, the answer is -77/324

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