-70.49% is the change from 637 to 188
Calculation steps:
[( 188 - 637 ) ÷ 637] x 100 = -70.49%
Formula
Percentage change = [(188 - 637) / 637] x 100
Subtract the new number by the original number
188 - 637 = -449
-449 ÷ 637 = -0.7048665620094191
-0.7048665620094191 x 100 = -70.49%