Noun
こうりつ
効率が第一だということを、しっかり心に刻んで置いてください。
Keep in mind that efficiency is our top priority.
Your effective percent shows how effective you are. If you're at an effective percent of 80%, that's your efficiency.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.