A stock loses 10% of its value on Monday. On Tuesday it loses 20% of the value it had at the end of the day on Monday. What is the overall percent loss in value from the beginning of Monday to the end of Tuesday?
Call the value before Monday's loss, V
After Monday...the stock is worth .90V
After Tuesday, the stock is worth .80 (.90V) = .72V
So....it loses 1 - .72 = 28% of its value
100% - 10% =90%
90% x (100 -20)= 72%
100 -72= 28% loss from original value.
