-84.42% is the change from 815 to 127
Calculation steps:
[( 127 - 815 ) ÷ 815] x 100 = -84.42%
Formula
Percentage change = [(127 - 815) / 815] x 100
Subtract the new number by the original number
127 - 815 = -688
-688 ÷ 815 = -0.8441717791411043
-0.8441717791411043 x 100 = -84.42%