-61.63% is the change from 834 to 320
Calculation steps:
[( 320 - 834 ) ÷ 834] x 100 = -61.63%
Formula
Percentage change = [(320 - 834) / 834] x 100
Subtract the new number by the original number
320 - 834 = -514
-514 ÷ 834 = -0.6163069544364509
-0.6163069544364509 x 100 = -61.63%