On friday, 65% of the students at plainview middle school bought a hot lunch and the rest of the students packed thier lunch. what fraction of students packed their lunch? select all that apply

Alright! We know that the total number of students is 100%. So, if 65% of the students brought a hot lunch, in order to find how many students brought a packed lunch you subtract it from 100%:

[100 - 65] = 35

So 35% of the students brought a packed lunch. Now, in order to find the fraction of students you simply put 35% of students over the total percent of students (100%)"

[35/100]

Then you simply:

[35/100] ⇒ [7/20]

The answer is 7/20ths of the students brought a packed lunch.

More: 
Decimal form - .35
Percentage form - 35%