-81.02% is the change from 669 to 127
Calculation steps:
[( 127 - 669 ) ÷ 669] x 100 = -81.02%
Formula
Percentage change = [(127 - 669) / 669] x 100
Subtract the new number by the original number
127 - 669 = -542
-542 ÷ 669 = -0.8101644245142003
-0.8101644245142003 x 100 = -81.02%