-23.39% is the change from 637 to 488
Calculation steps:
[( 488 - 637 ) ÷ 637] x 100 = -23.39%
Formula
Percentage change = [(488 - 637) / 637] x 100
Subtract the new number by the original number
488 - 637 = -149
-149 ÷ 637 = -0.23390894819466249
-0.23390894819466249 x 100 = -23.39%