Question 313150
Percentage problems can usually be set up as a proportion. A proportion is two equal ratios

{{{part/whole=percent/100}}}

so set the problem up, the part is 50, the whole is 200:

{{{50/200=x/100}}}

cross-multiply:
{{{50*100 = 200x}}}

{{{5000 = 200x}}}

divide by 200:

{{{5000/200=200x/200}}}

{{{25=x}}} so the answer is 25%