-84.53% is the change from 821 to 127
Calculation steps:
[( 127 - 821 ) ÷ 821] x 100 = -84.53%
Formula
Percentage change = [(127 - 821) / 821] x 100
Subtract the new number by the original number
127 - 821 = -694
-694 ÷ 821 = -0.8453105968331304
-0.8453105968331304 x 100 = -84.53%