-84.33% is the change from 134 to 21
Calculation steps:
[( 21 - 134 ) ÷ 134] x 100 = -84.33%
Formula
Percentage change = [(21 - 134) / 134] x 100
Subtract the new number by the original number
21 - 134 = -113
-113 ÷ 134 = -0.8432835820895522
-0.8432835820895522 x 100 = -84.33%