A Woman Starts Out With $\$ 10,000$ One Year, the Government Takes a Certain Percentage

Short Answer

A woman starts out with $\$ 10,000$ . One year, the government takes a certain percentage $t$ of this money. The next year, the government takes the same percentage out of the remainder of the woman's money. She is left with $\$ 8,100$ . What is the percentage $t$ ?