-40.41% is the change from 834 to 497
Calculation steps:
[( 497 - 834 ) ÷ 834] x 100 = -40.41%
Formula
Percentage change = [(497 - 834) / 834] x 100
Subtract the new number by the original number
497 - 834 = -337
-337 ÷ 834 = -0.4040767386091127
-0.4040767386091127 x 100 = -40.41%