-32.78% is the change from 421 to 283
Calculation steps:
[( 283 - 421 ) ÷ 421] x 100 = -32.78%
Formula
Percentage change = [(283 - 421) / 421] x 100
Subtract the new number by the original number
283 - 421 = -138
-138 ÷ 421 = -0.32779097387173395
-0.32779097387173395 x 100 = -32.78%