User blog comment:TesseractusJr/When do you think Deku will reach 50% of One for All/@comment-35090048-20180518125126/@comment-28495164-20180522155933

Maybe a little later than that at the pace he's at, but yeah, around there. He at least has to hit 100% (or a refined 100%, more similar to or greater than All Might's powers) by the time he gets out of high school or shortly thereafter, symbolizing that his training is complete and that he is a full-fledged hero, capable of becoming the greatest.