-67.86% is the change from 669 to 215
Calculation steps:
[( 215 - 669 ) ÷ 669] x 100 = -67.86%
Formula
Percentage change = [(215 - 669) / 669] x 100
Subtract the new number by the original number
215 - 669 = -454
-454 ÷ 669 = -0.6786248131539612
-0.6786248131539612 x 100 = -67.86%