-39.93% is the change from 834 to 501
Calculation steps:
[( 501 - 834 ) ÷ 834] x 100 = -39.93%
Formula
Percentage change = [(501 - 834) / 834] x 100
Subtract the new number by the original number
501 - 834 = -333
-333 ÷ 834 = -0.39928057553956836
-0.39928057553956836 x 100 = -39.93%