Percent Increase & Decrease, Population Growth Problems - SAT Math Part 34

Which formula is used to calculate the percentage change between an original value and a new value?

• (New Value + Original Value) / Original Value × 100%

• (New Value - Original Value) / Original Value × 100%

• (Original Value - New Value) / New Value × 100%

• (New Value - Original Value) / New Value × 100%

The average rent for a 1-bedroom apartment was $950 in 2008. By 2018, it increased to $1,425. What was the percentage increase in rent?

• 40%

• 45%

• 50%

• 55%

A stock's price changed from $70 to $48 in one year. What was the percentage change in the stock's price?

• -31.4%

• +25.6%

• -28.3%

• -32.6%

An island had 35,000 cats in the year 2000. If the cat population increases by 3% each year, what will be the approximate population of cats by the year 2024?

• 56,150

• 62,478

• 67,583

• 71,148

What was the initial number of tigers on the continent in the year 2000?

• 45,000

• 50,000

• 55,000

• 60,000

By what percentage does the tiger population decrease every 5 years?

• 5%

• 4.5%

• 4%

• 3.5%

How many years pass between the year 2000 and the year 2100?

• 50 years

• 75 years

• 100 years

• 120 years

How many minutes are in 2 hours?

• 60 minutes

• 90 minutes

• 120 minutes

• 180 minutes