YOU SAID:

he didn't have to use more than one percent of his power

INTO JAPANESE

彼は自分の力の1パーセント以上を使う必要はありませんでした

BACK INTO ENGLISH

He did not need to spend more than 1 percent of his power

INTO JAPANESE

彼は自分の力の1パーセント以上を費やす必要はありませんでした

BACK INTO ENGLISH

He did not have to spend more than 1 percent of his power

INTO JAPANESE

彼は自分の力の1パーセント以上を費やす必要はありませんでした

BACK INTO ENGLISH

He did not have to spend more than 1 percent of his power