-31.49% is the change from 505 to 346
Calculation steps:
[( 346 - 505 ) ÷ 505] x 100 = -31.49%
Formula
Percentage change = [(346 - 505) / 505] x 100
Subtract the new number by the original number
346 - 505 = -159
-159 ÷ 505 = -0.31485148514851485
-0.31485148514851485 x 100 = -31.49%