-83.46% is the change from 127 to 21
Calculation steps:
[( 21 - 127 ) ÷ 127] x 100 = -83.46%
Formula
Percentage change = [(21 - 127) / 127] x 100
Subtract the new number by the original number
21 - 127 = -106
-106 ÷ 127 = -0.8346456692913385
-0.8346456692913385 x 100 = -83.46%