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Using proportions, it is found that it's value before the 2-day drop was of 264 points.
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
In this problem, the value dropped by 25%, that is, it was 75% of the original amount, and the dropped value was of 198 points, hence the original amount was:
0.75x = 198
x = 198/0.75
x = 264
More can be learned about proportions at https://brainly.com/question/24372153
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