-73.63% is the change from 838 to 221
Calculation steps:
[( 221 - 838 ) ÷ 838] x 100 = -73.63%
Formula
Percentage change = [(221 - 838) / 838] x 100
Subtract the new number by the original number
221 - 838 = -617
-617 ÷ 838 = -0.7362768496420048
-0.7362768496420048 x 100 = -73.63%