Correct

三七开

/ sān qī kāi /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/三七开-Chinese-idioms-Cchatty-9794d631-aaf5-42cd-931b-b7ca2eaebb57-1612776147.jpg

Collocation

1
他的功过应该是三七开
2
读书也要三七开
3
利润三七开

Definition

三七开

Literally means:

seventy-thirty ratio

Actually means:

It means dividing the profit or investment according to a seventy-thirty ratio. It may also mean evaluating a person's achievements and faults or something's merits and demerits according to a seventy thirty ratio.

指按一方占三(十分之三),另一方占七(十分之七)的标准分配利润,投放力量。也指对人的功劳和过失,或事物的成绩和缺点,按三比七进行评价。

Example

Used as predicate or object. (作谓语、宾语)
1
Zánmen
咱们
liǎ
一起
kāi
gōng
公司
  
,
tóu
投资
  
,
jīngyíng
经营
  
,
zhuàn
de
qián
sān
三七
kāi
zěnmeyàng
怎么样
  
?
sān
  

Let's start a company together, you invest, I run, make money three or seven open how? You seven I three.

2
Zhèyàng
这样
de
fēnpèi
分配
gōngpíng
公平
  
,
wèishénme
为什么
liǎng
rén
tóngyàng
同样
de
gōngzuò
工作
  
,
ér
bàochou
报酬
què
sān
三七
kāi
  
?

Such distribution is unfair, why do two people work the same job and are paid three or seven times?

3
Rénmen
人们
duì
de
píngjià
评价
yīnggāi
应该
shì
sān
三七
kāi
  
,
fēn
gōngláo
功劳
  
,
sān
fēn
guòshī
过失
  

People's evaluation of him should be three or seven, that is, seven credit, three points of error.