Determine whether the following claim could be true. Explain your answer. Average hotel room rates have increased by $100 \%$ in the last $20$ years.

Determine whether the following claim could be true. Explain your answer. Anna bought a surfboard online and saved $125 \%$.

Solve the following percentage problem. The $4550$ men in the arena comprised $85 \%$ of the people in the arena. How many people were in the arena?

Determine whether the following claim could be true. Explain your answer. Through hard training, Renee improved her $10$-kilometer running time by $100 \%$.

State whether the following statement is true or false, and explain why. If a statement is false, state the true change. A high school reports that its students' SAT scores were down by $10 \%$ in one year. The next year, however, SAT scores rose by $20 \%$. The high school principal announces, "Overall, test scores have improved by $10 \%$ over the past two years."

Determine whether the following claims could be true. Explain your answer.

Your computer is $250 \%$ slower than mine.

Determine whether the following claim could be true. Explain your answer. Scott is $200 \%$ taller than his son.

Describe the following changes in two ways: as an absolute change in terms of percentage points and as a relative change in terms of a percentage. Alcohol use by high school seniors decreased from $50.0 \%$ in $2000$ to $35.3 \%$ in $2015$.

Complete the following sentence. The marriage rate in the United States in $2014$ ($6.9$ marriages per $1000$ people) is__________ percent less than the marriage rate in $1980$ ( $10.6$ per $1000$ people).

Fill in the blanks in the following statement. The area of Norway is $24 \%$ more than the area of Colorado, so Norway's area is__________ $\%$ of Colorado's area.

Fill in the blanks in the following statement. The population of Hawaii is $52 \%$ less than the population of Arkansas, so the population of Hawaii is__________ $\%$ of the population of Arkansas.

Solve the following percentage problem. Between $2000$ and $2015$, the number of twin births in the United States increased by $13 \%$, to approximately $135,000$. About how many twin births were there in $2000$?

State whether the following statement is true or false, and explain why. If a statement is false, state the true change. If the national unemployment rate decreased at an annual rate of $2 \%$ per year for three consecutive years, then the rate decreased by $6 \%$ over the three-year period.

Complete the following sentence. The life expectancy (at birth) of all Americans in $2014$ ( $78.8$ years) is__________ percent greater than the life expectancy in $1900$ ($47.3$ years).