-32.16% is the change from 939 to 637
Calculation steps:
[( 637 - 939 ) ÷ 939] x 100 = -32.16%
Formula
Percentage change = [(637 - 939) / 939] x 100
Subtract the new number by the original number
637 - 939 = -302
-302 ÷ 939 = -0.32161874334398294
-0.32161874334398294 x 100 = -32.16%