-80.87% is the change from 669 to 128
Calculation steps:
[( 128 - 669 ) ÷ 669] x 100 = -80.87%
Formula
Percentage change = [(128 - 669) / 669] x 100
Subtract the new number by the original number
128 - 669 = -541
-541 ÷ 669 = -0.8086696562032885
-0.8086696562032885 x 100 = -80.87%