-72.75% is the change from 811 to 221
Calculation steps:
[( 221 - 811 ) ÷ 811] x 100 = -72.75%
Formula
Percentage change = [(221 - 811) / 811] x 100
Subtract the new number by the original number
221 - 811 = -590
-590 ÷ 811 = -0.7274969173859432
-0.7274969173859432 x 100 = -72.75%