-33.71% is the change from 961 to 637
Calculation steps:
[( 637 - 961 ) ÷ 961] x 100 = -33.71%
Formula
Percentage change = [(637 - 961) / 961] x 100
Subtract the new number by the original number
637 - 961 = -324
-324 ÷ 961 = -0.33714880332986474
-0.33714880332986474 x 100 = -33.71%