-68.13% is the change from 160 to 51
Calculation steps:
[( 51 - 160 ) ÷ 160] x 100 = -68.13%
Formula
Percentage change = [(51 - 160) / 160] x 100
Subtract the new number by the original number
51 - 160 = -109
-109 ÷ 160 = -0.68125
-0.68125 x 100 = -68.13%