-77.58% is the change from 959 to 215
Calculation steps:
[( 215 - 959 ) ÷ 959] x 100 = -77.58%
Formula
Percentage change = [(215 - 959) / 959] x 100
Subtract the new number by the original number
215 - 959 = -744
-744 ÷ 959 = -0.7758081334723671
-0.7758081334723671 x 100 = -77.58%