-78.64% is the change from 426 to 91
Calculation steps:
[( 91 - 426 ) ÷ 426] x 100 = -78.64%
Formula
Percentage change = [(91 - 426) / 426] x 100
Subtract the new number by the original number
91 - 426 = -335
-335 ÷ 426 = -0.7863849765258216
-0.7863849765258216 x 100 = -78.64%