-34.38% is the change from 666 to 437
Calculation steps:
[( 437 - 666 ) ÷ 666] x 100 = -34.38%
Formula
Percentage change = [(437 - 666) / 666] x 100
Subtract the new number by the original number
437 - 666 = -229
-229 ÷ 666 = -0.34384384384384387
-0.34384384384384387 x 100 = -34.38%