-32.85% is the change from 959 to 644
Calculation steps:
[( 644 - 959 ) ÷ 959] x 100 = -32.85%
Formula
Percentage change = [(644 - 959) / 959] x 100
Subtract the new number by the original number
644 - 959 = -315
-315 ÷ 959 = -0.3284671532846715
-0.3284671532846715 x 100 = -32.85%