-77.63% is the change from 961 to 215
Calculation steps:
[( 215 - 961 ) ÷ 961] x 100 = -77.63%
Formula
Percentage change = [(215 - 961) / 961] x 100
Subtract the new number by the original number
215 - 961 = -746
-746 ÷ 961 = -0.7762747138397502
-0.7762747138397502 x 100 = -77.63%