What does the word 'of' mean in '12 - 2/3 of 30 - 8'?

[Sophie]

What does the word "of" mean in the following order of operations question?

12-2/3 of 30-8

Thanks sophie

 

[Denis]

Re: of

What does the of mean in the following order of operations question
12-2/3 of 30-8

2/3 of 30 means 2/3 times 30; or 2 * 30 / 3 = 20

so you now have 12 - 20 - 8

 

[Sophie]

thanks