-77.1% is the change from 834 to 191
Calculation steps:
[( 191 - 834 ) ÷ 834] x 100 = -77.1%
Formula
Percentage change = [(191 - 834) / 834] x 100
Subtract the new number by the original number
191 - 834 = -643
-643 ÷ 834 = -0.7709832134292566
-0.7709832134292566 x 100 = -77.1%