-36.26% is the change from 637 to 406
Calculation steps:
[( 406 - 637 ) ÷ 637] x 100 = -36.26%
Formula
Percentage change = [(406 - 637) / 637] x 100
Subtract the new number by the original number
406 - 637 = -231
-231 ÷ 637 = -0.3626373626373626
-0.3626373626373626 x 100 = -36.26%