Let, the total number of students in school that ride the bike to school be "x"
Now,
Using ratio and proportion, we get,
\(\frac{5}{32} = \frac{x}{800}\)
\(\frac{5}{32}*800 = \frac{x}{800} *800\)
\(\frac{4000}{32} =x\)
\(125 =x\)
\(x=125\)
So, out of 800 students, 125 ride their bike to school.