-6.86% is the change from 452 to 421
Calculation steps:
[( 421 - 452 ) ÷ 452] x 100 = -6.86%
Formula
Percentage change = [(421 - 452) / 452] x 100
Subtract the new number by the original number
421 - 452 = -31
-31 ÷ 452 = -0.06858407079646017
-0.06858407079646017 x 100 = -6.86%