150 is 66 2/3 % of what number?
31.5 is 33 1/3 % of what number?
What this question is asking is...
$\displaystyle 66 \frac{2}{3}$% $\displaystyle = 66.67$% $\displaystyle =.6667 = 2/3$
$\displaystyle \Rightarrow x \times 2/3 = 150.$ Solve for $\displaystyle x.$ Then,
$\displaystyle \Rightarrow x = \frac{150}{2/3} = 225.$
Similarly,
$\displaystyle 33 \frac{1}{3}$% $\displaystyle = 33.33$% $\displaystyle =.3333 = 1/3$
$\displaystyle \Rightarrow x \times 1/3 = 31.5.$ Solve for $\displaystyle x.$ Then,
$\displaystyle \Rightarrow x = \frac{31.5}{1/3} = 94.5.$