With just a small amount of calculating, it can be easy enough to roll that D12 (the least used die of the polyhedral set, arguably) and take a fourth of the roll for each of the 25% increments. The D12 can also be used to get that D3 roll that I’ve heard so many people complain about. A roll of 1-4 = 1, 5-8 = 2, and 9-12 = 3. Simple. The D6 can also be divided into the D3 pretty easy. It is when we get into the multiple dice that things get a little more complicated. 2D6 is not the same as a D12. 4D6 is not a D24 and so forth, so be careful.
Go with what is most pleasing to your sensibilities when it comes to which dice to roll, but stay grounded in mathematical accuracy when choosing which die and which combo of dice to use. It will make the game more fun for you and that’s what it really comes down to.
Author: Dr. Jeff Goins is the Founder and CEO of Dwarven Tavern. He writes lots of tombs, carves articles of stones, and publishes a wealth of knowledge. His latest books include Dwarven Tavern Short Hooks and Quick Start Story Ideas, Growing Up Haunted: The Tollgate, and Life In The Shadows.