The bar graph below shows the number of members in a fitness club from 2018 to 2022. Study the graph and answer questions 5 and 6. Between which 2 years was there more than 100% increase in membership?

1. Read the number of members for each year from the bar graph.

From the graph:

• 2018: $150$
• 2019: $300$
• 2020: $750$
• 2021: $850$
• 2022: $1150$

2. Understand the condition for a 'more than 100% increase'.

A more than $100\%$ increase means the new value is more than double the old value (i.e., the increase is greater than the original value).

3. Check the increase between 2018 and 2019.

Increase = $300 - 150 = 150$.
Percentage increase = $\frac{150}{150} \times 100\% = 100\%$.
This is exactly $100\%$, not more than $100\%$.

4. Check the increase between 2019 and 2020.

Increase = $750 - 300 = 450$.
Percentage increase = $\frac{450}{300} \times 100\% = 150\%$.
Since $150\% > 100\%$, this is the correct pair.