-55.74% is the change from 305 to 135
Calculation steps:
[( 135 - 305 ) ÷ 305] x 100 = -55.74%
Formula
Percentage change = [(135 - 305) / 305] x 100
Subtract the new number by the original number
135 - 305 = -170
-170 ÷ 305 = -0.5573770491803278
-0.5573770491803278 x 100 = -55.74%