-52.97% is the change from 657 to 309
Calculation steps:
[( 309 - 657 ) ÷ 657] x 100 = -52.97%
Formula
Percentage change = [(309 - 657) / 657] x 100
Subtract the new number by the original number
309 - 657 = -348
-348 ÷ 657 = -0.5296803652968036
-0.5296803652968036 x 100 = -52.97%