-64.84% is the change from 657 to 231
Calculation steps:
[( 231 - 657 ) ÷ 657] x 100 = -64.84%
Formula
Percentage change = [(231 - 657) / 657] x 100
Subtract the new number by the original number
231 - 657 = -426
-426 ÷ 657 = -0.6484018264840182
-0.6484018264840182 x 100 = -64.84%