The value of stocks can vary dramatically. Suppose a stock decreases in value by 50% one year. The next year it increases by 50%. By how many percent has the value of the stock decreased over the two year period?

The stock is decreased by 25% over the two year period.

Step-by-step explanation:

Since we have given that

Decrease in value in one year = 50% = x

Increase in value in second year = 50% = y

So, Net change in stock over the two year period is given by

Hence, the stock is decreased by 25% over the two year period.

it would be:

c.parallelogram.

1/4 because there is 4 grades.