-77.73% is the change from 669 to 149
Calculation steps:
[( 149 - 669 ) ÷ 669] x 100 = -77.73%
Formula
Percentage change = [(149 - 669) / 669] x 100
Subtract the new number by the original number
149 - 669 = -520
-520 ÷ 669 = -0.7772795216741405
-0.7772795216741405 x 100 = -77.73%