-80.97% is the change from 268 to 51
Calculation steps:
[( 51 - 268 ) ÷ 268] x 100 = -80.97%
Formula
Percentage change = [(51 - 268) / 268] x 100
Subtract the new number by the original number
51 - 268 = -217
-217 ÷ 268 = -0.8097014925373134
-0.8097014925373134 x 100 = -80.97%