Help me :p . :] And ty if you do.​

11.25 is the third one

11.25

Step-by-step explanation:

The question is basically asking "what is 75% of 15"

75%=3/4

The height is 15

3/4 of 15 is 11.25

So the new height is 11.25 units

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: