-28.95% is the change from 936 to 665
Calculation steps:
[( 665 - 936 ) ÷ 936] x 100 = -28.95%
Formula
Percentage change = [(665 - 936) / 936] x 100
Subtract the new number by the original number
665 - 936 = -271
-271 ÷ 936 = -0.28952991452991456
-0.28952991452991456 x 100 = -28.95%