-30.86% is the change from 956 to 661
Calculation steps:
[( 661 - 956 ) ÷ 956] x 100 = -30.86%
Formula
Percentage change = [(661 - 956) / 956] x 100
Subtract the new number by the original number
661 - 956 = -295
-295 ÷ 956 = -0.30857740585774057
-0.30857740585774057 x 100 = -30.86%