-64.71% is the change from 666 to 235
Calculation steps:
[( 235 - 666 ) ÷ 666] x 100 = -64.71%
Formula
Percentage change = [(235 - 666) / 666] x 100
Subtract the new number by the original number
235 - 666 = -431
-431 ÷ 666 = -0.6471471471471472
-0.6471471471471472 x 100 = -64.71%