4 sentences

1. 在分数四分之三中，三是分子。

   zài fēn​shù sì fēn​zhī sān zhōng, sān shì fēn​zǐ.

   In the fraction three-quarters, three is the numerator.

   Source: Dong Chinese Dictionary

2. 这种商品占市场份额的百分之三十。

   zhè zhǒng shāng​pǐn zhàn shì​chǎng fèn'é de bǎi fēn​zhī sān​shí.

   This product accounts for thirty percent of the market share.

   Source: Dong Chinese Dictionary

3. 今年的利润比去年同期增长了百分之五。

   jīn​nián de lì​rùn bǐ qù​nián tóng​qī zēng​zhǎng le bǎi fēn​zhī wǔ.

   This year's profit increased by five percent compared to the same period last year.

   Source: Dong Chinese Dictionary

4. 地球表面的四分之三是海洋，四分之一是陆地。

   dì​qiú biǎo​miàn de sì fēn​zhī sān shì hǎi​yáng, sì fēn​zhī yī shì lù​dì.

   Three-quarters of the Earth's surface is ocean, and one-quarter is land.

   Source: Dong Chinese Dictionary