The algae on the surface of a pond increases in size by 10% each day. At night the algae on the surface of the same pond is reduced by 5%.

The price of an item was increased by 20 percent. The new price of the item was decreased by x percent, resulting in a final price that is 28 percent less than the original price.

A pack of 12 pens costs $ 72. If each pen is purchased individually it costs $ 7.

q>0

A discount of 5 percent on the listed price of an article was offered, reducing the profit by $120 that could have been earned if it were sold at the listed price.

The yearly rent collected by a firm from a property was p percent more in 2008 than that in 2007 and q percent less in 2009 than that in 2008. It is known that

After a 20 % discount, a dress is sold at a price of $176

The price of a stock decreased by 20 percent and then increased by x percent. x < 25.

A deposit of $1,000 is made in a bank account, compounded annually, at a rate of r percent.

The amount accumulated after two years is greater than $1,210.

Half of the shirts in a closet are white and 30% of the remaining shirts are gray