-38.15% is the change from 637 to 394
Calculation steps:
[( 394 - 637 ) ÷ 637] x 100 = -38.15%
Formula
Percentage change = [(394 - 637) / 637] x 100
Subtract the new number by the original number
394 - 637 = -243
-243 ÷ 637 = -0.3814756671899529
-0.3814756671899529 x 100 = -38.15%