Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Symbol | Prefix | SI Meaning | Binary meaning | Size difference |
| --- | --- | --- | --- | --- |
| K | kilo | 10 3 = 1000 1 | 2 10 = 1024 1 | 2.40% |
| M | mega | 10 6 = 1000 2 | 2 20 = 1024 2 | 4.86% |
| G | giga | 10 9 = 1000 3 | 2 30 = 1024 3 | 7.37% |
| T | tera | 10 12 = 1000 4 | 2 40 = 1024 4 | 9.95% |
| P | peta | 10 15 = 1000 5 | 2 50 = 1024 5 | 12.59% |
| E | exa | 10 18 = 1000 6 | 2 60 = 1024 6 | 15.29% |
| Z | zetta | 10 21 = 1000 7 | 2 70 = 1024 7 | 18.06% |
| Y | yotta | 10 24 = 1000 8 | 2 80 = 1024 8 | 20.89% |
Question:
What is the size difference for exa?
Answer:
15.29%