Answer
Find out the 450 is 75 percent of what number .
To prove
Formula
[tex]Percentage = \frac{Part\ value\times100}{Total\ value}[/tex]
As given
450 is 75 percent
thus
Percentage = 75%
Part value = 450
Put in the formula
[tex]75 = \frac{450\times100}{Total\ number}[/tex]
[tex]Total\ number = \frac{45000}{75}[/tex]
Total number = 600
Therefore 450 is 75 percent of 600.