$\"\"$

The number of students at franklin high school increasing from $\"\"$ to $\"\"$ over a $\"\"$ -year period.

Find the percent of increase.

The formula of percent change is $\"\"$ .

$\"\"$ (Original proportion)

$\"\"$ (Simplify)

$\"\"$ (Find the cross products)

$\"\"$ (Simplify)

$\"\"$ (Divide each side by $\"\"$ )

$\"\"$ (Cancel common terms)

The percent of increase is $\"\"$ .

Option $\"\"$ is right choice.

$\"\"$

Option $\"\"$ is right choice.