-78.65% is the change from 637 to 136
Calculation steps:
[( 136 - 637 ) ÷ 637] x 100 = -78.65%
Formula
Percentage change = [(136 - 637) / 637] x 100
Subtract the new number by the original number
136 - 637 = -501
-501 ÷ 637 = -0.7864992150706437
-0.7864992150706437 x 100 = -78.65%