4. The number of the medical workers of this hospital is reduced 4 times than before, while that of the out-patients has increased by 140 percent.

这个医院的医务人员数比过去减少了 3/4，而门诊病人却增加了 1.4倍。

(或：这个医院的医务人员数减少到了过去的1/4，而门诊病人却增加了140%）

5. The mortality of the disease is reduced five times after liberation.

解放后此病的死亡率减低到过去的1/5。

(或：解放后此病的死亡率降低了80%。）

6. By using this new process the loss of the materials was declined by a factor of 4.

采用这种新工艺使材料的损耗

(或：采用这种新工艺使材料的损耗降低到原来的1/4。)

7.  The incidence of the disease in young children has been lowered nearly fivefold over the last three decades.

幼儿患此病的发病率在过去30年中降低了将近80%。

（或：幼儿患此病的发病率在过去30年中降低到将近1/5。）

8. This can be achieved by reducing the length of the laser tube by a factor of ten.

把激光管长度缩短到1/10，就可做到这一点。

 (或：如要!放到’这」点奇将激光管長度缩短90D

9. Early studies indicated that the readmission rate of patients could be reduced 3 times if they are maintained on depot injection rather than oral medication.

早期研究表明：如用长效注射法而不是用口服药物维持，则患者的再次住院率可降低2/3。

（或：早期研究表明：如用长效注射法而不是用口服药物维持，则患者的再次住院率可降低到1/3。)