-12.86% is the change from 350 to 305
Calculation steps:
[( 305 - 350 ) ÷ 350] x 100 = -12.86%
Formula
Percentage change = [(305 - 350) / 350] x 100
Subtract the new number by the original number
305 - 350 = -45
-45 ÷ 350 = -0.12857142857142856
-0.12857142857142856 x 100 = -12.86%