-49.4% is the change from 834 to 422
Calculation steps:
[( 422 - 834 ) ÷ 834] x 100 = -49.4%
Formula
Percentage change = [(422 - 834) / 834] x 100
Subtract the new number by the original number
422 - 834 = -412
-412 ÷ 834 = -0.4940047961630695
-0.4940047961630695 x 100 = -49.4%