Answers

Subtract 54/70 from 9/80

9/80 - 54/70 is -369/560.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 70 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 80 × 7 = 560,
   9/80 = 9 × 7/80 × 7 = 63/560
3. Likewise, for the 2nd fraction, since 70 × 8 = 560,
   54/70 = 54 × 8/70 × 8 = 432/560
4. Subtract the two like fractions:
   63/560 - 432/560 = 63 - 432/560 = -369/560

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