-78.18% is the change from 417 to 91
Calculation steps:
[( 91 - 417 ) ÷ 417] x 100 = -78.18%
Formula
Percentage change = [(91 - 417) / 417] x 100
Subtract the new number by the original number
91 - 417 = -326
-326 ÷ 417 = -0.7817745803357314
-0.7817745803357314 x 100 = -78.18%