-79.81% is the change from 104 to 21
Calculation steps:
[( 21 - 104 ) ÷ 104] x 100 = -79.81%
Formula
Percentage change = [(21 - 104) / 104] x 100
Subtract the new number by the original number
21 - 104 = -83
-83 ÷ 104 = -0.7980769230769231
-0.7980769230769231 x 100 = -79.81%