-76.91% is the change from 957 to 221
Calculation steps:
[( 221 - 957 ) ÷ 957] x 100 = -76.91%
Formula
Percentage change = [(221 - 957) / 957] x 100
Subtract the new number by the original number
221 - 957 = -736
-736 ÷ 957 = -0.7690700104493208
-0.7690700104493208 x 100 = -76.91%