Answer:
1.7% decrease
Step-by-step explanation:
You want to know the percentage decrease in a price that was 2.88 yesterday and is 2.83 today.
The percentage change is calculated from ...
%change = ((new value) -(old value))/(old value) × 100%
%change = (2.83 -2.88)/2.88 × 100% = -0.05/2.88 × 100% ≈ -1.7%
The price decreased 1.7% from yesterday's price.
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Additional comment
When the sign of the change is negative, it signifies a decrease. A positive sign signifies an increase.