If Jamaica's population grows from 2.5 million in 2010 to 3.0 million in 2020, what is the percentage increase over the decade?

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Multiple Choice

If Jamaica's population grows from 2.5 million in 2010 to 3.0 million in 2020, what is the percentage increase over the decade?

Explanation:
The key idea is how to calculate percentage change: (new minus old) divided by old, then multiply by 100. Here, the population grows from 2.5 million to 3.0 million, so the increase is 0.5 million. 0.5 divided by 2.5 equals 0.2, and 0.2 times 100 is 20. So the population increased by 20% over the decade. The other options would require different increases (0.25, 0.375, or 0.625 million), which don’t match the actual 0.5 million increase.

The key idea is how to calculate percentage change: (new minus old) divided by old, then multiply by 100. Here, the population grows from 2.5 million to 3.0 million, so the increase is 0.5 million. 0.5 divided by 2.5 equals 0.2, and 0.2 times 100 is 20. So the population increased by 20% over the decade. The other options would require different increases (0.25, 0.375, or 0.625 million), which don’t match the actual 0.5 million increase.

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