Answer
Find out the how much of her total sales did she donate .
To prove
Let us assume that the songstress gives away of the sales of her signature fragrance collection to her charity be x.
Formula
[tex]Percentage = \frac{Part\ value\times100}{Total\ value}[/tex]
As given
songstress gives away 25 percent of the sales of her signature fragrance collection to her charity.
Last month her sales were 1200.
Thus
Percentage = 25 %
Total value = 1200
Put in the formula
[tex]25 = \frac{x\times100}{1200}[/tex]
[tex]x = \frac{25\times1200}{100}[/tex]
[tex]x = \frac{30000}{100}[/tex]
x = 300
Therefore songstress gives away of the sales of her signature fragrance collection to her charity be 300 .