-66.97% is the change from 657 to 217
Calculation steps:
[( 217 - 657 ) ÷ 657] x 100 = -66.97%
Formula
Percentage change = [(217 - 657) / 657] x 100
Subtract the new number by the original number
217 - 657 = -440
-440 ÷ 657 = -0.669710806697108
-0.669710806697108 x 100 = -66.97%