It's not quite accurate to say a specific percentage of Hawaii is covered by volcanoes. Instead, it's more accurate to say that all of the Hawaiian Islands are formed by volcanoes.

Here's why:

* Volcanic Origins: All eight main Hawaiian Islands were created by volcanic activity over millions of years. The islands are essentially the tops of massive underwater volcanoes.

* Continuing Activity: Some volcanoes in Hawaii are still active, like Mauna Loa and Kilauea on the Big Island.

* Eroded Landforms: Over time, volcanic features like lava flows, craters, and caldera have eroded and been reshaped by wind, rain, and ocean waves. This creates the diverse landscapes we see today, from lush rainforests to black sand beaches.

So, while you can't pinpoint a percentage of land covered by volcanoes, it's safe to say volcanic activity is the foundation of the Hawaiian Islands.