-52.32% is the change from 669 to 319
Calculation steps:
[( 319 - 669 ) ÷ 669] x 100 = -52.32%
Formula
Percentage change = [(319 - 669) / 669] x 100
Subtract the new number by the original number
319 - 669 = -350
-350 ÷ 669 = -0.523168908819133
-0.523168908819133 x 100 = -52.32%