-91% is the change from 811 to 73
Calculation steps:
[( 73 - 811 ) ÷ 811] x 100 = -91%
Formula
Percentage change = [(73 - 811) / 811] x 100
Subtract the new number by the original number
73 - 811 = -738
-738 ÷ 811 = -0.9099876695437731
-0.9099876695437731 x 100 = -91%