-33.58% is the change from 959 to 637
Calculation steps:
[( 637 - 959 ) ÷ 959] x 100 = -33.58%
Formula
Percentage change = [(637 - 959) / 959] x 100
Subtract the new number by the original number
637 - 959 = -322
-322 ÷ 959 = -0.3357664233576642
-0.3357664233576642 x 100 = -33.58%