-31.29% is the change from 505 to 347
Calculation steps:
[( 347 - 505 ) ÷ 505] x 100 = -31.29%
Formula
Percentage change = [(347 - 505) / 505] x 100
Subtract the new number by the original number
347 - 505 = -158
-158 ÷ 505 = -0.31287128712871287
-0.31287128712871287 x 100 = -31.29%