I found your complete question in another source.See attached image.
budget monthly income is:
$ 4670
living expenses is 35%
We then have to do the rule of three:
4670 $ ---> 100%
x ----------> 35%
Clearing x:
x = (35/100) * (4670)
x = 1634.5 $
Answer:
He spend on living expenses: 1634.5 $
