-78.49% is the change from 637 to 137
Calculation steps:
[( 137 - 637 ) ÷ 637] x 100 = -78.49%
Formula
Percentage change = [(137 - 637) / 637] x 100
Subtract the new number by the original number
137 - 637 = -500
-500 ÷ 637 = -0.7849293563579278
-0.7849293563579278 x 100 = -78.49%