$\"\"$

The part is 15 and the whole is 60. You need to find the percent.

Let n represent the percent.

Part = percent $\"\"$ whole

15 = n $\"\"$ 60 (Substitute part = 15 and whole = 60) $\"\"$

$\"\"$ (Divide each side by 60)

$\"\"$ (Cancel common terms)

$\"\"$ (Divide: $\"\"$ )

$\"\"$ (Multiply with 100 and add percent sign)

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

15 is 25 $\"\"$ of 60.