-53.21% is the change from 421 to 197
Calculation steps:
[( 197 - 421 ) ÷ 421] x 100 = -53.21%
Formula
Percentage change = [(197 - 421) / 421] x 100
Subtract the new number by the original number
197 - 421 = -224
-224 ÷ 421 = -0.5320665083135392
-0.5320665083135392 x 100 = -53.21%