-75.15% is the change from 342 to 85
Calculation steps:
[( 85 - 342 ) ÷ 342] x 100 = -75.15%
Formula
Percentage change = [(85 - 342) / 342] x 100
Subtract the new number by the original number
85 - 342 = -257
-257 ÷ 342 = -0.7514619883040936
-0.7514619883040936 x 100 = -75.15%