-37.83% is the change from 637 to 396
Calculation steps:
[( 396 - 637 ) ÷ 637] x 100 = -37.83%
Formula
Percentage change = [(396 - 637) / 637] x 100
Subtract the new number by the original number
396 - 637 = -241
-241 ÷ 637 = -0.3783359497645212
-0.3783359497645212 x 100 = -37.83%