An item that originally costs $12.00 was on the clearance aisle for $3.60. What is the percentage of discount?

70%

Step-by-step explanation:

$ was taken off. Now find out what is

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus