-91.53% is the change from 838 to 71
Calculation steps:
[( 71 - 838 ) ÷ 838] x 100 = -91.53%
Formula
Percentage change = [(71 - 838) / 838] x 100
Subtract the new number by the original number
71 - 838 = -767
-767 ÷ 838 = -0.9152744630071599
-0.9152744630071599 x 100 = -91.53%