-49.43% is the change from 437 to 221
Calculation steps:
[( 221 - 437 ) ÷ 437] x 100 = -49.43%
Formula
Percentage change = [(221 - 437) / 437] x 100
Subtract the new number by the original number
221 - 437 = -216
-216 ÷ 437 = -0.494279176201373
-0.494279176201373 x 100 = -49.43%