Question

420 000 tonnes of CFCs were released by developed countries. 4% of these findings are not in the documented data. How can you remedy this problem. Explain.
I don't understand what it is asking ..

Answer 1

They seem to want you to correct the data by adding another 4%, perhaps to each.

Answer 2

Sobasically 4 percent is missing. If I divide this 4% between the four categories I can add 1% to each to make up for the lost data ?