-68.71% is the change from 163 to 51
Calculation steps:
[( 51 - 163 ) ÷ 163] x 100 = -68.71%
Formula
Percentage change = [(51 - 163) / 163] x 100
Subtract the new number by the original number
51 - 163 = -112
-112 ÷ 163 = -0.6871165644171779
-0.6871165644171779 x 100 = -68.71%