-67.37% is the change from 665 to 217
Calculation steps:
[( 217 - 665 ) ÷ 665] x 100 = -67.37%
Formula
Percentage change = [(217 - 665) / 665] x 100
Subtract the new number by the original number
217 - 665 = -448
-448 ÷ 665 = -0.6736842105263158
-0.6736842105263158 x 100 = -67.37%