In a data table, Year 1 has 10 units and Year 3 has 20 units. What is the percent increase from Year 1 to Year 3?

In a data table, Year 1 has 10 units and Year 3 has 20 units. What is the percent increase from Year 1 to Year 3?

• A. 50%
• B. 0%
• C. 200%
• D. 100%

Answer: (D)

Percent change shows how much something grows relative to its starting amount. To find the percent increase, subtract the original value from the new value, divide by the original value, and multiply by 100. Here, starting at 10 units and moving to 20 units, the increase is 10. So 10 divided by 10 equals 1, and 1 times 100 equals 100%. That means the quantity has doubled, a 100% increase. If the new value were 15, the increase would be 50%; if it were 30, it would be 200%.

Percent change shows how much something grows relative to its starting amount. To find the percent increase, subtract the original value from the new value, divide by the original value, and multiply by 100. Here, starting at 10 units and moving to 20 units, the increase is 10. So 10 divided by 10 equals 1, and 1 times 100 equals 100%. That means the quantity has doubled, a 100% increase. If the new value were 15, the increase would be 50%; if it were 30, it would be 200%.