Here is your answer:
In order to find the answer divide the numerator by the denominator then divide that by one hundred:
- 100%/x%=500/335
- (100/x)*x=(500/335)*x
- 100=1.49253731343*x
- (1.49253731343)
- 100/1.49253731343=x
- x=67
Therefore "335 is 67% of 500."
Hope this helps!