I have to work out the percentage change in the proportion of carbon dioxide in the atmosphere between certain time periods represented on a graph.If someone could give me some hints on how to approach this I would be very grateful just not sure what to arrange calculation.

I would start with calculating the percent composition of CO2 for the given times. Then, after those are done, you can look at the changes.

Thanks

To work out the percentage change in the proportion of carbon dioxide in the atmosphere between two time periods represented on a graph, you can follow these steps:

1. Determine the initial value: Find the value of the proportion of carbon dioxide at the start of the first time period. Look at the graph and locate the data point representing the start of the time period.

2. Determine the final value: Find the value of the proportion of carbon dioxide at the end of the second time period. Locate the data point representing the end of the time period on the graph.

3. Calculate the difference: Subtract the initial value from the final value. This will give you the change in the proportion of carbon dioxide between the two time periods.

4. Calculate the percentage change: Divide the difference obtained in step 3 by the initial value, and then multiply by 100. This will give you the percentage change.

Formula:
Percentage Change = ((Final value - Initial value) / Initial value) * 100

By following these steps and using the formula above, you can calculate the percentage change in the proportion of carbon dioxide in the atmosphere between the specified time periods based on the graph.