Irene R. answered 12/03/19
BS in Mechanical Engineering and Certified math teacher for 13 years
The unit rate is the cost of one item. Here that would be the cost of one notepad.
Since 13 notepads cost $21, we can divide 21 by 13 to find the cost of one notepad:
$21/13 notepads = $1.62 for 1 notepad (This is the rounded unit rate from $1.615 per notepad)