-89.98% is the change from 838 to 84
Calculation steps:
[( 84 - 838 ) ÷ 838] x 100 = -89.98%
Formula
Percentage change = [(84 - 838) / 838] x 100
Subtract the new number by the original number
84 - 838 = -754
-754 ÷ 838 = -0.8997613365155132
-0.8997613365155132 x 100 = -89.98%