Question

there are 320 seniors at strong field high school. if 90% of them go expect to go to college, how many of the seniors expect to go to college?

Answer 1

288. to figure this out I set up a proporton, 90 (percent) over 100 ( percentages are always out of 100) and x ( the variable, what's ere trying to figure out) over 320 (since we are trying to find what over 320 is equal to 90 out of 100.
$\frac{90}{100} = \frac{x}{320}$
after cross multiplying, you find that 90/100 is equal to 288/320

Answer 2

$\bf a\%~of~b \implies \cfrac{ a}{100}\cdot b~\hfill \textit{90\% of 320 is }\cfrac{90}{100}\cdot 320$