0.019 is the correct answer. I hope this is the answer you are looking for! :)
I = {2.666666667, 1.166666667
What are we factoring i don't get it
The decrease was 27%.
Step-by-step explanation:
Old value = $980
New value = $720
Decrease = Old value - New value

Percent decrease = 

Rounding off to near whole percent
Percent decrease = 27%
The decrease was 27%.
Keywords: Percentage, subtraction
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