-37.48% is the change from 643 to 402
Calculation steps:
[( 402 - 643 ) ÷ 643] x 100 = -37.48%
Formula
Percentage change = [(402 - 643) / 643] x 100
Subtract the new number by the original number
402 - 643 = -241
-241 ÷ 643 = -0.374805598755832
-0.374805598755832 x 100 = -37.48%