Percentage 6-8 Grade Math

Question

There were 19,817 endangered species worldwide in 2012. In 2021, there were 23,051 endangered species. By what percent did the number of endangered species increase from 2012 to 2021? Express your answer to the nearest tenth.

Answer 1

There were 19,817 endangered species worldwide in 2012. In 2021, there were 23,051 endangered species. By what percent did the number of endangered species increase from 2012 to 2021? Express your answer to the nearest tenth.

fraction of increase = (change) divided by (original number)

fraction of increase = (2nd number - 1st number) divided by (1st number)

percentage of increase = (2nd number - 1st number) / (1st number) x 100

fraction = (23051 - 19817) / 19817

fraction = 3234 / 19817

fraction = 0.1631932...

% of increase = 0.1631932... x 100

% of increase = 16.31932...

% of increase = 16.3% [rounded to the nearest 10th]

EITHER EQUATION CAN BE USED, DEPENDING ON WHETHER THE FRACTION OR DECIMAL OR PERCENTAGE IS THE FORM OF THE ANSWER.

Answer 2

To find the percent increase you take the difference between the old population and the new population, and divide that by the old population:

(23,051 - 19,817) / 19,817 = 3,234/19,817 = .1631...

Written as a percentage to the nearest tenth, you get 16.3%