-45.79% is the change from 570 to 309
Calculation steps:
[( 309 - 570 ) ÷ 570] x 100 = -45.79%
Formula
Percentage change = [(309 - 570) / 570] x 100
Subtract the new number by the original number
309 - 570 = -261
-261 ÷ 570 = -0.45789473684210524
-0.45789473684210524 x 100 = -45.79%