-57.58% is the change from 66 to 28
Calculation steps:
[( 28 - 66 ) ÷ 66] x 100 = -57.58%
Formula
Percentage change = [(28 - 66) / 66] x 100
Subtract the new number by the original number
28 - 66 = -38
-38 ÷ 66 = -0.5757575757575758
-0.5757575757575758 x 100 = -57.58%