Lily wants to buy a cow but can't afford the $25 it costs. Later in the year it is at an affordable $15 and Lily can buy it. What percentage of a discount was on the cow? Please explain :)

There was 60% discount on the cow.

Step-by-step explanation:

Discount can be calculated by dividing the latest price by the original price and multiplying by 100.

Thus,

percentage discount = 15/25 × 100

                                   = 0.6 × 100

                                    = 60%

Thus, there was 60% discount on the cow.

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584