2) In January, Dicky was 1.5 m tall but by December he has grown up to 1.62 m.Find the percentage increases in participants.
3) In a reading programme, the number of participants increases from 8 to 32.Find the percentage icreases in participants.
我這樣做，有沒有錯呢？
(新 － 舊）／舊 ｘ １００％＝Ａｎｓ
1） （６０－４０）／４０ ｘ １００％ ＝５０％
２）（１．６２－１．５）／１．５ｘ１００％＝８％
３）（３２－８）／８ ｘ １００％ ＝ ３００％
更新1:
其實問這條問題，是不甘心在知識答了對的答案，現在在公開投票中大比數輸緊給錯的答案啫 ~sad~ 多謝各位的指教~