-91.34% is the change from 843 to 73
Calculation steps:
[( 73 - 843 ) ÷ 843] x 100 = -91.34%
Formula
Percentage change = [(73 - 843) / 843] x 100
Subtract the new number by the original number
73 - 843 = -770
-770 ÷ 843 = -0.9134045077105575
-0.9134045077105575 x 100 = -91.34%