High School

The South African population grew by 19.8% between 2011 and 2022, from 51.7 million to 62 million. Show through calculations whether the percentage increase is correct.

Answer :

To determine if the percentage increase in the South African population from 1.7 million in 2011 to 62 million in 2022 is correct, follow these steps:

1. Convert Population Values:
- Start with the initial population in 2011, which was 1.7 million.
- The final population in 2022 was 62 million.

2. Calculate the Increase in Population:
- Subtract the initial population from the final population:
[tex]\( 62 \, \text{million} - 1.7 \, \text{million} = 60.3 \, \text{million} \)[/tex]

3. Calculate the Percentage Increase:
- Use the formula for percentage increase:
[tex]\[
\left( \frac{\text{Increase in population}}{\text{Initial population}} \right) \times 100
\][/tex]
- Plug in the numbers:
[tex]\[
\left( \frac{60.3 \, \text{million}}{1.7 \, \text{million}} \right) \times 100 = 3547.06\%
\][/tex]

4. Compare with the Claimed Increase:
- The question claims a 19.8% increase.
- Our calculated percentage increase is 3547.06%.

5. Conclusion:
- The actual percentage increase greatly exceeds the claimed 19.8%. Therefore, the percentage increase stated in the question is incorrect. The actual increase calculated is 3547.06%.

So, there is a significant difference, and the specific increase mentioned in the question does not match the calculated result.