-75.22% is the change from 343 to 85
Calculation steps:
[( 85 - 343 ) ÷ 343] x 100 = -75.22%
Formula
Percentage change = [(85 - 343) / 343] x 100
Subtract the new number by the original number
85 - 343 = -258
-258 ÷ 343 = -0.7521865889212828
-0.7521865889212828 x 100 = -75.22%