My impression was that 90% kanji are significantly phonetic but the remaining ideographic 10% are actually some of the most frequently used (上/下 and others)? W

My impression was that 90% kanji are significantly phonetic but the remaining ideographic 10% are actually some of the most frequently used (上/下 and others)? Which is what I referred to as "a good chunk of it". But I don't know what I'm talking about:)