What is the percent change of 15$ to 21$

40

Step-by-step explanation:A change from 15 to 21 represents a positive change (increase) of 40%

Use the formula found below on this webpage to find the percent change by replacing the given values:

Percent change = [(21 - 15) / |15|] x 100 = [(6) / 15] x 100 = 40 % (increase)

Where: 15 is the old value and 21 is the new value. In this case we have a positive change (increase) of 40 percent because the new value is greater than the old value.

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

hope this .

r3t40