-73.78% is the change from 347 to 91
Calculation steps:
[( 91 - 347 ) ÷ 347] x 100 = -73.78%
Formula
Percentage change = [(91 - 347) / 347] x 100
Subtract the new number by the original number
91 - 347 = -256
-256 ÷ 347 = -0.7377521613832853
-0.7377521613832853 x 100 = -73.78%