-79.62% is the change from 834 to 170
Calculation steps:
[( 170 - 834 ) ÷ 834] x 100 = -79.62%
Formula
Percentage change = [(170 - 834) / 834] x 100
Subtract the new number by the original number
170 - 834 = -664
-664 ÷ 834 = -0.7961630695443646
-0.7961630695443646 x 100 = -79.62%