A perfect score (100 out of 100); full marks. Also used figuratively to mean perfection or leaving nothing to be desired.
彼女は数学のテストで１００点満点を取った。
She got a perfect score of 100 on the math test.
あの演技は１００点満点と言っていいほど素晴らしかった。
That performance was so great you could call it a perfect ten (100/100).
この宿題は１００点満点中８５点の評価だった。
This homework was graded 85 out of 100.
Grading on a scale of 0 to 100; the system of evaluating by points out of a hundred.
成績は１００点満点で評価され、平均点は72点だった。
Grades were given on a 100-point scale, and the average was 72.
このクラスではテストは全て１００点満点で採点される。
In this class, all tests are graded on a 100-point scale.