-68.9% is the change from 164 to 51
Calculation steps:
[( 51 - 164 ) ÷ 164] x 100 = -68.9%
Formula
Percentage change = [(51 - 164) / 164] x 100
Subtract the new number by the original number
51 - 164 = -113
-113 ÷ 164 = -0.6890243902439024
-0.6890243902439024 x 100 = -68.9%