-27% is the change from 637 to 465
Calculation steps:
[( 465 - 637 ) ÷ 637] x 100 = -27%
Formula
Percentage change = [(465 - 637) / 637] x 100
Subtract the new number by the original number
465 - 637 = -172
-172 ÷ 637 = -0.27001569858712715
-0.27001569858712715 x 100 = -27%