-66.74% is the change from 959 to 319
Calculation steps:
[( 319 - 959 ) ÷ 959] x 100 = -66.74%
Formula
Percentage change = [(319 - 959) / 959] x 100
Subtract the new number by the original number
319 - 959 = -640
-640 ÷ 959 = -0.6673618352450469
-0.6673618352450469 x 100 = -66.74%