-81.36% is the change from 354 to 66
Calculation steps:
[( 66 - 354 ) ÷ 354] x 100 = -81.36%
Formula
Percentage change = [(66 - 354) / 354] x 100
Subtract the new number by the original number
66 - 354 = -288
-288 ÷ 354 = -0.8135593220338984
-0.8135593220338984 x 100 = -81.36%