-97% is the change from 434 to 13
Calculation steps:
[( 13 - 434 ) ÷ 434] x 100 = -97%
Formula
Percentage change = [(13 - 434) / 434] x 100
Subtract the new number by the original number
13 - 434 = -421
-421 ÷ 434 = -0.9700460829493087
-0.9700460829493087 x 100 = -97%