Is it a "but"? 100/10 = 10, no?

saying "10x smaller" is like saying "1000% cheaper"

	▲	Dylan16807 8 hours ago \| parent [-]
		"[whole number]x smaller" is pretty clearly division (with 1 being invalid). Percents have the problem that they can be above or below 100% in a way that causes ambiguity and makes it messy.