-3.66% is the change from 437 to 421
Calculation steps:
[( 421 - 437 ) ÷ 437] x 100 = -3.66%
Formula
Percentage change = [(421 - 437) / 437] x 100
Subtract the new number by the original number
421 - 437 = -16
-16 ÷ 437 = -0.036613272311212815
-0.036613272311212815 x 100 = -3.66%