-67.22% is the change from 421 to 138
Calculation steps:
[( 138 - 421 ) ÷ 421] x 100 = -67.22%
Formula
Percentage change = [(138 - 421) / 421] x 100
Subtract the new number by the original number
138 - 421 = -283
-283 ÷ 421 = -0.672209026128266
-0.672209026128266 x 100 = -67.22%