http://breezewiki.vernccvbvyi5qhfzyqengccj7lkove6bjot2xhh5kajhwvidqafczrad.onion/minecraft/wiki/Experience
. ↑ a b c d e f For fractional values, first multiply this value by the number of smelted items removed from the furnace, then award the player the whole-number part, and if there is a fractional part remaining, this represents the chance of an additional experience point. For example, when smelting 1 coal ore and removing the coal, the value is 0.1, so this grants a 10% chance of getting 1 experience point.