-62.91% is the change from 833 to 309
Calculation steps:
[( 309 - 833 ) ÷ 833] x 100 = -62.91%
Formula
Percentage change = [(309 - 833) / 833] x 100
Subtract the new number by the original number
309 - 833 = -524
-524 ÷ 833 = -0.6290516206482593
-0.6290516206482593 x 100 = -62.91%