-81.2% is the change from 351 to 66
Calculation steps:
[( 66 - 351 ) ÷ 351] x 100 = -81.2%
Formula
Percentage change = [(66 - 351) / 351] x 100
Subtract the new number by the original number
66 - 351 = -285
-285 ÷ 351 = -0.811965811965812
-0.811965811965812 x 100 = -81.2%