-75.36% is the change from 345 to 85
Calculation steps:
[( 85 - 345 ) ÷ 345] x 100 = -75.36%
Formula
Percentage change = [(85 - 345) / 345] x 100
Subtract the new number by the original number
85 - 345 = -260
-260 ÷ 345 = -0.7536231884057971
-0.7536231884057971 x 100 = -75.36%