-74.7% is the change from 336 to 85
Calculation steps:
[( 85 - 336 ) ÷ 336] x 100 = -74.7%
Formula
Percentage change = [(85 - 336) / 336] x 100
Subtract the new number by the original number
85 - 336 = -251
-251 ÷ 336 = -0.7470238095238095
-0.7470238095238095 x 100 = -74.7%