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1%を求める方法

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1秒間に最大150回の回転をする機械が
1秒間45回しか回転しなかった場合
達成率は何パーセントかという時

150 × 0.01 = 1.5が1%になります。
なので、45回転に1%を割れば
達成率のパーセントが求められます。
45 ÷ 1.5 = 30%

次に、1秒間に300回の回転をする機械は
何パーセントの達成率なのかを考えます。
まあ、2倍なので200%でしょって事なんですが

ちゃんと計算すると以下のXは10%になります。

150 × X = 15
X = 15 ÷ 150
X = 0.1 (10%)

この式を使うと

150 × X = 300
X = 300 ÷ 150
X = 2 (200%)

という感じで求められます!
簡単ですね。

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