-37.65% is the change from 834 to 520
Calculation steps:
[( 520 - 834 ) ÷ 834] x 100 = -37.65%
Formula
Percentage change = [(520 - 834) / 834] x 100
Subtract the new number by the original number
520 - 834 = -314
-314 ÷ 834 = -0.3764988009592326
-0.3764988009592326 x 100 = -37.65%