-82.66% is the change from 421 to 73
Calculation steps:
[( 73 - 421 ) ÷ 421] x 100 = -82.66%
Formula
Percentage change = [(73 - 421) / 421] x 100
Subtract the new number by the original number
73 - 421 = -348
-348 ÷ 421 = -0.8266033254156769
-0.8266033254156769 x 100 = -82.66%