-91.11% is the change from 821 to 73
Calculation steps:
[( 73 - 821 ) ÷ 821] x 100 = -91.11%
Formula
Percentage change = [(73 - 821) / 821] x 100
Subtract the new number by the original number
73 - 821 = -748
-748 ÷ 821 = -0.9110840438489647
-0.9110840438489647 x 100 = -91.11%