How many Earthquake spells to destroy a level 9 wall in CoC?

So, to destroy a wall, you need 2 level 4 earthquake spells(You again get the 4% off.) I hope that answers your query well. Clash On! EDIT- After the latest update rolled out by supercell, the 1st Earthquake spell deals a good amount of damage to any building(25%). But it's damage keeps reducing thereafter. read more

It takes 18056 level 2 Earthquake spells to completely destroy a building. It takes 1921 level 3 Earthquake spells to completely destroy a building. It takes 1 maxed Earthquake Spell to do 25% damage. The next 7 do about 25.5% damage, and it takes 419 to fully destroy a building. read more

Multiply it by 4, and you have 24% damage to a wall by a level 1 earthquake spell. In total, you need 4 level 1 earthquake spells to destroy a wall(Although it amounts to 96%, but apparently the game gives you a waiver of 4% since you've already destroyed 96% of the wall. read more