[tex]\text{What percent of 15 is 3,000?}\\\\\text{Calculate what fraction of the number 15 is 3,000}\\\\\dfrac{3,000}{4}=750\\\\\text{Convert it to a percent}\\\\750\cdot100\%=75,00\%\\\\Answer:\ \boxed{3,000\ is\ 75,000\%\ of\ 4.}[/tex]