-33.73% is the change from 421 to 279
Calculation steps:
[( 279 - 421 ) ÷ 421] x 100 = -33.73%
Formula
Percentage change = [(279 - 421) / 421] x 100
Subtract the new number by the original number
279 - 421 = -142
-142 ÷ 421 = -0.33729216152019004
-0.33729216152019004 x 100 = -33.73%