Based on statistics from a worldwide health organization, in 2005 there were  34.7 million people worldwide living with a certain disease, and 1.1 million deaths from the disease. By 2015, the number of people living with the disease had fallen to  30.1 million, and  1.4 million deaths were reported. Find the percent change for each statistic, and write any conclusions you can draw.

To analyze the data, we'll calculate the percent change in the number of people living with the disease and the percent change in the number of deaths from the disease between 2005 and 2015.

### 1. Percent Change in the Number of People Living with the Disease

The formula for percent change is:

\[
\text{Percent Change} = \left(\frac{\text{New Value} - \text{Old Value}}{\text{Old Value}}\right) \times 100
\]

Substituting the values:

\[
\text{Percent Change in Population} = \left(\frac{30.1 \text{ million} - 34.7 \text{ million}}{34.7 \text{ million}}\right) \times 100
\]

\[
= \left(\frac{-4.6 \text{ million}}{34.7 \text{ million}}\right) \times 100 \approx -13.25\%
\]

This indicates a **13.25% decrease** in the number of people living with the disease from 2005 to 2015.

### 2. Percent Change in the Number of Deaths

Similarly, for the number of deaths:

\[
\text{Percent Change in Deaths} = \left(\frac{1.4 \text{ million} - 1.1 \text{ million}}{1.1 \text{ million}}\right) \times 100
\]

\[
= \left(\frac{0.3 \text{ million}}{1.1 \text{ million}}\right) \times 100 \approx 27.27\%
\]

This indicates a **27.27% increase** in the number of deaths from the disease from 2005 to 2015.

### Conclusions:

1. **Decrease in Disease Prevalence**: The 13.25% decrease in the number of people living with the disease suggests that efforts to reduce the spread or treat the disease may have been somewhat effective.

2. **Increase in Mortality**: The 27.27% increase in deaths despite the reduction in disease prevalence indicates that those who contracted the disease were more likely to die, suggesting possible increases in the disease's severity, treatment challenges, or other factors affecting mortality.

Would you like more details or have any questions?

### Related Questions:
1. What factors could contribute to the increased mortality rate despite a decrease in prevalence?
2. How might public health interventions have influenced the reduction in disease prevalence?
3. What could explain the severity of the disease increasing over the 10-year period?
4. Are there specific regions or demographics where the prevalence and mortality rates differ significantly?
5. How do these changes compare to other diseases over the same period?

### Tip:
When interpreting percent changes, consider both the absolute and relative changes, as they provide different insights into the data.

Based on statistics from a worldwide health organization, in 2005 there were 34.7 million people worldwide living with a certain disease, and 1.1 million deaths from the disease. By 2015, the number of people living with the disease had fallen to 30.1 million, and 1.4 million deaths were reported. Find the percent change for each statistic, and write any conclusions you can draw.

Analyze the percent change in the number of people living with a disease and the number of deaths from 2005 to 2015. This problem involves calculating a 13.25% decrease in disease prevalence and a 27.27% increase in mortality. Learn how to apply the percent change formula to real-world health statistics.

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