55% towards expense

[Shulem Elias]

Hi BP Family , 

While learning on how to observe a rental deal generally before delving into the details, I cam across the tactic of just checking the Cap Rate on the deal , to see if it matches the investors interest, 

Example: 

Purchase price $190,000

Gross Operating Income: $30,000

Operating Expenses -55%

Vacancy: 5% 

= NOI: $12,825

$12,825/$190,000 = (0.0675) 6.7% cap rate 

While we all know Cap Rate isn’t everything in the deal, but for the beginning and brief observation it’s great. 

My question is just do you guys agree that 55% of the GOI goes towards operating expenses? 

Could be that I read this wrong? Please share with me any thoughts and experience you have about 

I’m attaching two screenshots where I read this idea.