-35.29% is the change from 102 to 66
Calculation steps:
[( 66 - 102 ) ÷ 102] x 100 = -35.29%
Formula
Percentage change = [(66 - 102) / 102] x 100
Subtract the new number by the original number
66 - 102 = -36
-36 ÷ 102 = -0.35294117647058826
-0.35294117647058826 x 100 = -35.29%