Convert 0284 Ppb to a Percent and Express the Answer in in Scientific

Convert 0.284 ppb to a percent and express the answer in scientific notation.

A) 2.84 $\times$ 10^-8 %
B) 2.84 $\times$ 10^-10 %
C) 2.84 $\times$ 10^-9 %
D) 2.84 $\times$ 10¹⁰ %