-33.7% is the change from 641 to 425
Calculation steps:
[( 425 - 641 ) ÷ 641] x 100 = -33.7%
Formula
Percentage change = [(425 - 641) / 641] x 100
Subtract the new number by the original number
425 - 641 = -216
-216 ÷ 641 = -0.3369734789391576
-0.3369734789391576 x 100 = -33.7%