-67.57% is the change from 959 to 311
Calculation steps:
[( 311 - 959 ) ÷ 959] x 100 = -67.57%
Formula
Percentage change = [(311 - 959) / 959] x 100
Subtract the new number by the original number
311 - 959 = -648
-648 ÷ 959 = -0.67570385818561
-0.67570385818561 x 100 = -67.57%