你答对了20%的答案——这意味着每五个中有一个。

You got 20 ___per ___cent of the answers right - that means one in every five.

只有40%的人费心去投票。

Only 40 ___per ___cent of people bothered to vote in the election.

我喜欢色彩鲜艳的衣服，这条裙子在打折，所以我只需支付原价的30%。

I love colourful clothes and this skirt was in a sale so I just had to pay 30 ___per ___cent of the old price.