-69.64% is the change from 168 to 51
Calculation steps:
[( 51 - 168 ) ÷ 168] x 100 = -69.64%
Formula
Percentage change = [(51 - 168) / 168] x 100
Subtract the new number by the original number
51 - 168 = -117
-117 ÷ 168 = -0.6964285714285714
-0.6964285714285714 x 100 = -69.64%